I don't think the learning curve for these games is too steep compared to skateboarding.
Pretty sure any piece of crap laptop can run league just go into the settings and turn everything to low.
My only problem with these games honestly is the amount of meta-slaves. You would think after being a game for 10 years the player-base would realize there is no 100% correct way to play, that's what makes them good games.
I play Sona, Lee sin, Ezreal, Amumu, and Udyr mostly but can play any champion/role if I need to. Full AP Sona is the best.