Mos Espa, Bestine and Escape from Hoth. Best maps in the whole mod, and will always be. Even that UnCos next map is going to kick pie, if he starts doing it.
I would think BOY or EFH would be best space map. For ground the urban maps work well, Im kinda torn on suggesting the only combined arms map we have though. It would be nice if more people weighed in since he is doing this for your benefit.
I reckon Mos Espa, Ryloth and Battle of Yavin myself, 3 totally different flavours of map and play style, though I would miss Battle of Taloraan and Escape from Hoth.