hopefully a combination of BOTH. In Toshinden if you connect the limit break attack it would do an automatic combo of punches etc, and pretty much it just looked cool and did some pretty substantial damage to the other player.
So that's what I'd hope this would do, perhaps do something like punch the opponent across the map and your player might automatically "teleport" to them and punch them a few times, etc, then maybe slam them into the ground and shoot some ki blasts or something.
Oh yeah, I just had a thought - even if your opponent dies at the start of the attack, they should still get the ****e flogged out of them
Perhaps we could think up some ideas to make the attack "individual" to each player. Someone mentioned making frieza use his tail, perhaps they could make Goku use a "kaioken" (have him saying it?) and a red aura etc, it would only be for effect, and not really have to be a move. Hehe, this way ESF team could say "yes we have added the kaioken to ESF - it is Goku's limit break move".
And just for Android 18, i think we should toss up between if we want these things to be:
More frequent, but less powerful and easier to connect to someone
Less frequent, but more powerful and harder to connect to someone
If they went with more frequent, you could probably say your limit break meter would reset if you died, and if you want less frequent then it could stay where it is when you die. Or consider this - if you die say 5 times in a row, your limit bar begins to fill up faster. This would add to making the game more equal for those getting ()wned. Consider, if you used Krillen and you keep getting owned you would get to use more powerful attacks more often than the winning players.