1v1 Chasms: Half because its a simple but fun map, and half for nostalga, because it was the first map I ever played in halo war (in the demo). And then I would come onto the forums and talk about it =P

2v2: I like all of them,(except crevice), but I would say my favourite is bealsly's plateau. I like ranking up my leader against all of the rebels.

3v3:Frozen valley, simple because its simple and allows one to execute tactics with ease.