EVE is a great game, and really unique among MMOs. It's very politically oriented, similar to Tibia; Corporations/guilds rise, struggle for supremacy and fall (sometimes without even the opportunity to struggle for supremacy). Also like Tibia, it's very PVP-oriented. There's no "PVE-only" in EVE. If you leave the station, you can and possibly will be killed, whether because people are out to get you or you happened to be the victim of suicide gankers.
It's well worth trying, but I found it to be too slow for my liking, and after a few months found myself logging into the game only for 10 minutes each day to keep my skill queue filled. I don't typically have the patience for MMOs, especially slower ones like EVE, but I have to say that it's one of the best and most unique MMOs I've played. If you're into Sci-Fi, space opera, PVP, sandbox gameplay, casual gameplay, political gameplay, griefing, ninja looting/salvaging or generally lack any standard for morality, you'll love EVE Online.