For me it depends on the mood of the month.
For a long time it was defence games.
Turret Defence mainly, but the others were just as fun, especially thr team versions.
That way its the whole, multi player, if I die, we all die thinking, we must work together.
Most lately it's been Cat n Mouse games.
The idea of ecading the stronger slower cat, while trying to get up resourcers to win and all.
Or, being the big slow cat, and wiping all the mice off the map.
But lately all you see are rigged version where if your a mouce, you can't lose, because the cat is screwed in too many ways.
So I've been looking for a new favorite.
I have great respect for the Bound maps, but my timing is so crappy, I don't play them for the other players sake.