Had this conversation with my husband and kids a while ago... Can't remember their answers but do remember their shock when I said sweetcorn as apparently according to my husband it doesn't count, it's an addition or filler.
So my favourite 3 vegatables (in no order) are
Leeks
Sweetcorn
Broccoli
What's everyone else's and do they agree that sweetcorn /peas are 'fillers'?