My favorite characters so far
1) Mordekaiser - holy christ creep killing machine with ranged god like ability, that gives you free shield of health! Mace of spades sorta sucky last skill to get lvled. creeping death, great for keeping your shield charged, and the children of the grave keeps enemy hero's away from getting the creep kills they need for money, enjoyable as all hell.
2)Rammus- because if he gets some money he becomes a god of chase, able to chase down all but yi
the lvl 4 taunt ability is so hilarious early game and late, taunt strongest heavy hitter enemy team has, run away from him at same time, while 4 of your teammates kill him away from their team, highly amusing.
3)Olaf- the viking god, that throwing axe shit is so beautiful, and his free lifesteal and increased dmg ability is oh so nice, actually all his abilities are beautiful. and his ability to attack faster the less life he has is insane, i purposely try to get like 3/4 or less health during early creeping phase to steal more creep kills.
4) Nunu- the support god of hero's, his ult is the ultimate support slow and fairly decent dmg. his thowing a iceball at enemies which dmg's and slows tremendously is also quite fantastic, Lots of support kills, and fairly hard to die since he can outrun with blood boil.
5) Ryze- oh yea the imprison ability which is like a snare, lasts a short time but does dmg and goes up to 2 seconds so its pretty good for team play. All his spells have super short cooldown, pretty fantastic in that way. Only played him a few times so far, but as long as you have skype with a teammate for ganks hes pretty solid.
thats about it ^_^ the rest of the hero's ive tried are just meh, i like a mix of ranged and melee character.