yeah man I truly quit RuneScape in 2009 and haven't cared to really touch a mmorpg let alone a game in general since.
I tried LoL once when it was like brand new and honestly between it just being too advanced for me (so it seemed) and my laggy computer, I just deleted it after the tutorial and haven't been avidly searching for any games anymore.
I want to say sometime late may/early june this year I dled LoL again to see what all the fuss is about (Seriously this game like blew up if you ask me), and I'm telling you right now - I was hooked from the get go. 4 gb ram and a good processor, I actually have a good computer that can run something beside MS paint. League of Legends is one of those games that is a staple for the kind of game it is. It's only 4 years old, but it's mainstream now and I only see it growing to be one of the, if not the, biggest MMORPGs of the decade. This game will go down in history, there's no doubt about it. Of course it's inevitable that the mainstream bubble will eventually pop and the game devs will sell out and another legendary game will be ruined by the greedy wall street folks so I would suggest playing while you can.
I started to ramble, but to get back on topic: this game could be appealing to a lot. It's not what you think it would be at first, the term "don't judge a book by it's cover" really comes into play here. I thought it would be difficult, and for awhile it was trial and error, but honestly now I want to slap myself for thinking this game was too advanced. RuneScape is more advanced by a LONG SHOT.
tl;dr: no matter how young you are, or old, or how big of a gamer you are - I swear just try this game, play the tutorial and a few rounds with the AI bots, and chances are your xbox or ps3 will miss you.
Seriously, I think I'm going to go play now.