It's about Points

So we have this position:

Black to move, in a Crazyhouse position.
I played …B@h5??
?? Absolutely.
Sure, it's mate. Butt I had P@h5#.
Mate with the Pawn! Because Style Points.
I only had 4.1 seconds remaining, so maybe that's an excuse.

See, here are the Rules:

If you can mate with Q or R, mate with the R.
If you can mate with Q or B (or N or P), mate with the lesser piece.
Always.
Or you don't earn the essential Style Points.
Mate with N beats mate with B or R, because knights are awesome.
Mate with P beats any piece. I mean, come on.

Exception: A slower mate does not earn Style Points. It's either clueless or obnoxious.
Or both.

Also: mating with a piece on the board beats dropping with mate. Because the most efficient mate is the best mate.

To summarize: P > N > (R or B) > Q.
Drop # < simple move #.

That is all.

Whoops! Another glance at the position shows that the best mate is the simple …h5#. No drops necessary.
See? B@h5# gets "??" for at least two reasons.

ok...not to sound offensive, but who asked

In my opinion Nh2 is the most elegant checkmate there.

You did!
Don't deny it.
I have the records.

Absolutely a reasonable opinion.