I like Strategy and Roleplay.
It's quite annoying spending all the time looking for one, but then when you download it; its a disappointment.
Lately I have been dying for a good Old Republic era mod for Star Wars Empire at War so I could have Hammerheads battle it out with Leviathans, but the AI is just so stupid and slow to the point where they never upgrade anything so I just end up walking over them.