@cozza: the main thing that convicens me about LoL is that you got a weekly rotation. This means you get a bunch of free to play heroes every week in order to play with them and check their abilities. Furthermore the community is kinda big and mostly great. There is a special system so you can't easily leave a game when it's running and if you start to flame/insult others it only takes a few moments to report him and make shure he doesnt start this again.
I never rly played HoN, so I dont got a serious opinion about this. But LoL convinced me so much, that I do not tend playing another game for now. Maybe if I get bored with LoL

@soul: yeah, Lulu is an extreme supporting character, but it's fun too. Already thought about playing Ryze cause he seems to be a hard hero that cant be taken down that easy. Furthermore he got many awesome skills to stun an opponent and in combination of an DPS char it's nearly impossible to kill them (already experienced that many times...)