I do spend quite a lot of time in the air in the SRV (vacuum, whatever)... max pips to engines. Sounds like @mp4x spends more time on his roof... demolition derby?
However, 'flight' implies air and as we've all been told by the Scarab sales people that our poor SRV's will explode on contact with atmosphere (of any kind) and therefore to only use it on truly airless worlds. So I'm more for a kind of
float-sim crossover