Further, monoculture lists are often rather brittle. It's better to run a varied list to take care of different threats.
Hmm. Somewhere I heard about a couple of monoculture lists doing very well. Something about 5 Gamma Bombers with Seismics. Must just be my imagination ;P
Oh, they can be fun. But that list has problems. It's great fun, especially against people who have never flown against it before. But considering that, in a 100 point list, you can only fly 4 Interceptors with Stealth device or 12 in an Epic list, I find it questionable to buy 14 firesprays because you need the cards. At that point, it's not a tournament, proxy it.