If anything, I want certain looks out of various other Sci-fi on my BT combat units.
For example, a lot of CAV look like the warbots I imagine should dominate the BattleTech franchise.
I'd love to see Heavy Gears become the dominant appearance for ProtoMechs.
I'd love to see Colonial Vipers as Aerospace fighters, as well as some of the ToG designs from interceptor.
The list can go on, but these are at the top.