I hate it.
I reset my system because I feel it's a waste of time dealing with them.
I especially hate the n00bs with f***ing Darkrai and Dark Void. -foams-
If I feel like kicking them around, I get going with it. I use one main Legendary, two, not on the same team, because they're part of a strategy. Kyogre because mine has really good Special Defense, and my Palkia, because I trained it myself.
I'm not a fan of using ubers, but those two are all I need.
Sig and Avy by Me ~