Melan
Explorer
We used 1 minute rounds in 1e and in 2e: being an abstract measure of time, there was no problem with it (just like we didn't mind memorization whereas many did). Right now, however, I have taken this concept a bit forward: a round represents a round, and that's it. When time constraints force it (like battling on a collapsing bridge), it is 10 seconds long. If the action is more relaxed, it is one minute. And when small armies duke it out, ten minutes. This does affect magic a bit, but who really cares? It is just a game for us, not reality simulation - not even the simulation of a fictional reality. 
