That's what my Dad does too!

That's exactly what I do!

After a second queen (or even my original queen), I often promote to a rook because a rook could just as easily checkmate with few pieces on the board. This prevents stalemate.

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I sometimes promote to a rook to prevent stalemate. I mean, how stupid do you feel when you could have won, but instead got in stalemate?

I cann't when I'm playing bughouse, (double Bliz)

i promoted to a bishop so that i had a mate in two, but queen or rook would have been instant

I under promote all the time.(when my sister is playing)

Wow, this is a great poll.

I remember I win by checkmate with1 queen against  2 queens and 1 rook

I underpromoted several decades ago, to a rook. I thought a rook was simpler.. I've rarely had the chance to promote since then.. It's been tough..

no

In one OTB game I under-promoted 7 bishops, the kid I did it against thought it was funny though

Don't often get the chance, of course, but I love to have a bunch of Queens.

It could be that they're hoping for a draw. It's not like mate is imminent. I'd say deliberately underpromoting is more offensive than fighting to the end, but that could be just me.

All of the above

i underpromote to a rook, when a rook is all i need to win.

I promoted to knight dozens of times, always in lasker trap. Doesn't happens to me anymore since people over ~1500 even if they fall for the trap, they don't fall all the way trough.

I need a multiple response option.

If it's just king vs. king and pawn and I promote, I always promote to a rook