I had a similar amount of time logged playing that game. I'm frankly glad I don't play it anymore, it stressed me out and was a waste of time. The only reason I would've continued playing is if it had a community I liked. A group of mature, friendly, funny people. A group like hubski... I'm kidding, hubski, do not make a League of Legends group, that'd be too much.
Yeah, sometimes I think to myself that I've played it enough and I should move on and find some time for all the other awesome games out there. I have all the champs and a huge chunk of IP piling up, it occupied me several years and I didn't really spend that much on it (really!). But somehow I have a weakness for competitive online games and I just keep coming back. The community honestly doesn't even bother me that much, but I either play ARAM/normals with friends or I play rankeds alone, but then again I'm high plat and that may spoil me regarding my teammates. And so I keep logging in every day and keep playing and playing and playing and...
I never got better than silver, and all I wanted to do was play at gold or platinum, just to get there, and then I'd stop. But I realized I had logged something like 2 months of real-time playing over a few years, and that I wasn't going to get any better just open-endedly playing. Different part of my life, that was something like a year ago I quit. I realized if I spent a fraction of that time doing anything else, it'd probably be a better use of my time. So I took to drug dealing and womanizing. KIDDING