Poker 
<3
Blackjack w/ card counting
Most other casino games:
(when played for real $)
Poker has always been fun for me, although for the longest time I didn't take it that seriously and approximately broke even over the long run. Over the last couple months I've slowly been studying the game, and the knowledge I've learned combined with me actually taking the game seriously has turned me into a winning player. (I actually have somebody providing money for me to play with in exchange for a part of my profits). I'm nowhere near at the level I would need to make a full living off it, but it's providing a nice bit of side income for university...and the sky's the limit for moving up in stakes, so who knows.
(inb4 "making a living with poker is unrealistic" or "there's no strategy at poker": the entire memberbase of http://forumserver.twoplustwo.com/ disagrees with you)
<3 Blackjack w/ card counting
Most other casino games:
(when played for real $)Poker has always been fun for me, although for the longest time I didn't take it that seriously and approximately broke even over the long run. Over the last couple months I've slowly been studying the game, and the knowledge I've learned combined with me actually taking the game seriously has turned me into a winning player. (I actually have somebody providing money for me to play with in exchange for a part of my profits). I'm nowhere near at the level I would need to make a full living off it, but it's providing a nice bit of side income for university...and the sky's the limit for moving up in stakes, so who knows.
(inb4 "making a living with poker is unrealistic" or "there's no strategy at poker": the entire memberbase of http://forumserver.twoplustwo.com/ disagrees with you)