I played LoL for around 2 days. Didn't like it so much because I'm not really into RTS games. I like freeroam and games that let you do anything, much like GMod, Minecraft and GTA.
However my whole school population has played it. Most(65%) played for 2 weeks+ and quit because they say it's very repetitive. I have a friend that has played over 7000 matches.....