I have never owned a motorcycle with...

[Asian Boss]

A boxer engine
An adventure bike
A generic commuter bike
A German bike
A British bike
Anything pre 1985

I've had all of those. Nothing with >4 cylinders or a stereo though. Those are broadly getting into pretty niche territory.

Or a Ducati, or anything with a slipper clutch or quickshifter, Or traction control now I think about it. Broadly because I'm old / tight. And because I could learn all of yous on my auld twin shocker.

[Newey]

A road 2 stroke with expansion chambers, but have owned a lot of 2 strokes.
2 cylinders and it being a 4 stroke

[harum-scarum]

...out dropping it. Although the current one is pulling up the average survival time every day

[Wossname]

....a supremely talented rider on board.

[Dickyboy]

IL4 - although I rode a mates 400/4 with a sticking throttle to the sw custom & classic show many moons ago (bit like having cruise control & great fun)
Parallel twin
Triple
Ducati - although very tempted
Kawasaki
Anything British or American - think the only Brit bike I've ridden is a Brough

So 38yrs of vee twins & singles, but just got myself a boxer twin adventure bike last month.