Basically, I want to be able to play a game mode in which every player can be the same champion. Here is a list of reasons I want to see this:
All Jarvan - DEMACIA!!! DEMACIA!!! DEMACIA!!! DEMACIA!!!
All Urgot - Swap, swap, swap, swap
All Twitch/Evelyn - League of Legends: Black Ops
All Shaco - You know there is one bush you just CAN'T go in, but which is it?
All Garen - See All Jarvan
All Vayne - tumble fest
All Soraka vs. All Janna - Support battle!
etc. etc.

I'm guessing this isn't particularly difficult to implement, and would make LAN parties so much more fun. I figure the easiest way to implement this would be to simply remove the same-champion restriction from normal blind pick.

What all-same-champion teams would you like to see?

Edit: This only makes sense if it is a custom game.

Uber Bump... This is a great idea.

Removing the restriction for Normal games is a bad idea. It would be neat to have this option in Custom games though.

how about all Karthus

Gratuitous self bump.

I lvoe this idea. All singed versus all singed. NO KILLS FTW!

All Karthus.

Double ace every single teamfight.

Problem?

All Morde/Yorick might be cool too.