Meeting new people, easier to obtain needed information, GOG, online games and communication...
The usual. I'm not really addicted to it though, I've got plenty of stuff IRL.

I'd be in on that... Maybe if another person is keen, it'll be like a 4 pack Steam sale.
On topic...
- The internet has enabled me to actually communicate, to an extent. Something I do very little of in real life.
- Found love, heartbreak, et cetera
- Gave me an excuse to travel to meet said girlfriends
- Gave me an outlet for my depression, currently seeking a new one.
- Met new people, some of which I still keep in contact with and see every now and then
- Satisfies my curiousity, Google is awesome.
- Opened up my gaming world, thanks GOG.
- Plenty of cheap things to order over the internet. (sadly can not find a Russian bride on eBay)
For the most part it's been a positive experience, there are some negative points, but such is life.

The internet has allowed me to become a much more efficient stalker.

But doesn't it take the fun out of stalking if you're just looking at your victim's Facebook page, rather than showing up at the person's house?

Perhaps in a different climate, but the hot, humid and often mosquito filled nights here make sneaking around in the bushes quite unpleasant.

I'd never get laid if it weren't for the internet, which is ... kidna ironic actually.
I'd not have my fiance if it weren't for the internet, which is ironic as well.
I wouldn't play Dawn of War with my friends. Yeah, life-changing experience.
I'd spend half as much money.
I would... I dunno, I wouldn't know you guys? Hmm... Ok.
Edit: uu! Yeah! Heart broken! People seem to mention that! ... It was actually pretty interesting experience!
EditEdit: I wouldn't know about existence about simulator of praying. Eww.
Not. Cool.
Anyhow, I have the internets in my appartment! We should continue! Or just play good old DoW! Oh... Right... My notebook is in hell... Well, my graphics card has melted, so I guess it's in hell, dunno about temperatures up in heaven - should be freezing thou...

Heh as long as there's no requirement to be connected to the internet...
I suggest shiny things. Self mutilation is never the answer, mutilating OTHER people, however...

Hey you're the one who sprints after the grenade like a dog chasing a ball... Sadly my notebook is probably sitting right next to yours in IT hell, its GPU seems to have melted. You don't have a HP DV9000 as well do you?

- Entertainment, mostly.
- Finding people with similar tastes in hobbies, instead of just hanging with friends who don't have that much in common with you.
- Cheap, quick communication with far away relatives. No more snail mail.
- News, fact finding, article searching, image searching and porn.
- Keeping up to date with events happening merely minutes or hours away instead of seeing it at the six o' clock news or finding about it the next day on newspapers.
- Work stuff.
- Gaming and gaming communities (Hi, everyone!)

I have developed a very very pale complexion and direct sunlight burns my eyeballs. Other than that, it's great! I use it for:
- Researching random crap
- Buying anything
- Looking for work
- Keeping up to date with stuff I can't afford
- Pretending I have a sociable side to me.
Also as a side note - HP DV9000s are direct from satan himself, Getting them open to repair is nigh on impossible, parts always turn up when you don't want them and when you see a whole queue waiting to be fixed suicide seems like a very good idea...

Good and bad:
+ I find and attend more concerts/sporting events.
+ I can figure out how to get from where I am (point A) to point B.
+ I cling to old friendships more through social networking
- Meet fewer new people.
- I don't call friends randomly just to catchup.
- I read fewer books/magazines/newspapers.
- I spend more time reading/writing about computer games than playing them.
+ I can download articles for work without going to the library to make photocopies.
- I end up having bigger stacks of articles to read than I have time.
+ I don't put up with getting slow and diluted news from TV newscasts...includes sports and weather.
- I spend time writing what I consider thoughtful forum posts to people I don't know who are more interested in posting their own thoughtful forum posts than have a conversation. (Admit it, you have to love my hypocrisy.)

Can you live with a constant connection with the Russian mob? It's almost on the same level...
lol
I wonder how that will hold up in court.. Shiny things are always good, it's just a shame that I'm so full of apathy that even retail therapy doesn't help that much.

I think this pic sums it up.

I wouldn't have built my own PC or figured out many of the problems I've encountered while programming if it weren't for the net. I also wouldn't own near as many PC games, because I have been buying only digitally for a long time now. I wouldn't know about near as many awesome games, either.

Since I started using it, it has become to largest enabler of my procrastinator habits.

Well, I could say the Internet hasn't changed my life much, but I'd be lying my ass off, as would anyone else who actually uses the internet and can post here. But let's see what I can come up with:
Pros
-Allowed me to find out about stuff I'd never have learned of otherwise.
-Allowed me to meet many friends who have interests in things that I like.
-Met the woman of my dreams and am now happilly engaged. She's a gamer, too! :D
-Play games I've missed or forgotten about (abandonware, old console emulation)
-Meet people from all over the world
-Discovered things about shows/series/games I never imagined.
Cons
-Allowed me to find out about stuff I'd never have learned of otherwise... *shudder*
-Discovered things about shows/series/games I never imagined...
-Stolen years of my life away..
-Showed me how depraved and degraded Humanity had fallen...
Etc, etc... I mean really, you can't take the good without the bad, they say.. but there's times where I wish the bad stuff on the internet was less. But it seriously has changed my life forever... in many ways.