zaine-h: So tell me, what games would you recommend?
Just to throw some out there from some of my personal favorites from various genres:
Stronghold / Stronghold Crusader:
Best castle sims ever made. The former one is definitely better for newbies as it provides a fun campaign and is better at teaching you the game's mechanics, but the latter has overall better longevity and its Arabian-style music is very lovely. It takes a really special RTS to hold my interest these days as I've fallen out of love with the genre over a decade ago. I most certainly love coming back to this one.
Descent 1&2 Despite me having played both numerous times these two are still such a blast to play to this day. One of gaming's best action franchises bar none. Quite playable with keyboard-only controls (I would certainly not recommend a mouse), but a proper flight stick does certainly make the whole experience even more fun.
Wing Commander: Privateer Pixelated and old as hell as this action flight sim is, it's still my favorite Elite-style game due to a great setting and very fun gameplay. Also my favorite WC game. (flight stick recommended)
Rayman Origins I was really surprised by how much I loved this whimsical 2D platformer. Without a doubt the top of the class as far as pure fun is concerned with some very tight controls.
King of Dragon Pass One of the few gems I've never even heard of until it's GOG re-release. This fantasy clan simulator is unique, fun, and always different every new time you play.
Gemini Rue Surprisingly I found this lovely adventure romp to easily rival some of the greats in its genre. While some may not be too keen on the 'action' scenes, I actually quite enjoyed the breakup in gameplay with a little more direct input.
Master of Orion 2 & Alpha Centauri They may be old, but they're still some of the best 4x games this side of the galaxy. Neither one has ever really been trumped since their release.
Locomotion I'm always baffled by how much hate this game gets, especially as I found OpenTTD's menu system to be a cluster**** in comparison to Locomotion's relatively easy-to-use system. Anyway, this is pretty much my go-to game for relaxing (along with its older cousin RCT2). Building train routes, as always, is the most fun. Choo choo! ;)