Pretty much as the title says, I'd recommend Eve Online only for the minority of people to be totally honest, it's a pretty niche game but also a game I've had more enjoyment with than any other. But still it's a game you won't know if you'll like it till you try it and it sure as hell doesn't hurt to try it out.
In case you didn't know Eve Online is a sandbox MMO set in a sci-fi universe, there are a few things that make it different from your average MMO:
No instancing and no sharding, this means that in theory that you could have everyone in the same system simultaneously.
Also worth pointing out that Eve is a PvP game, PvP is always on and the only thing that's going to protect you is the security status of the system you're in, in high security space you are protected by concord, if a player shoots at you in high security space concord will turn up within 5-15 seconds and kill your attacker. Note: this does not neccessarily mean that you will survive, just that they won't be leaving with their ship intact.
Eve is 100% persistant and player driven. Every ship you see flying around and every ship you buy on the market was built, found or produced in some way by a real player. In fact the vast majority of anything you find in the game was made by players, in null-sec (zero security space) very little is predefined, massive alliances of thousands of players build space stations, control sovereignty over hundreds of solar systems and go to war with other alliances in huge 2000 player fights. The other side to this persistence is that when you lose something it's gone, there's no respawning ships or modules, they're gone for good.This makes the stakes in these fights especially high with trillions of ISK (the currency) on the line.
If you got 20 minutes free I recommend you watch this video of a rather epic fight that occurred less than a week ago iirc,
with over 10 trillion isk fielded and over 700 billion isk destroyed over a single titan pilot misclicking (the leviathan they're talking about) and getting himself in a bad position the term "well that escalated quickly comes to mind" the losses would have been much higher had this fight been in null-sec but due to various mechanics that are limited in low security space where this took place a lot of people were able to narrowly escape. Once everyone starts arriving it just becomes a giant ***, a pretty cool *** though, most fights tend to be more organised than this one.
Just be warned, the learning curve is pretty infamous, this image pretty much sums it up
http://cdn1.eveonline.com/community/devblog/2011/eve-learning-curve.jpgSo if you do feel like giving it a go I'd really appreciate it if you used my link:
https://secure.eveonline.com/trial/?invc=b463d987-9df9-48e6-a943-ae854e092133&action=buddyEDIT: forgot to mention, using a buddy invite like this you get your free trial extended to 21 days instead of 14.