Don't have a range where I can truly practice. Just punching paper from a stationary position. But to get what I can out of it, I shoot one handed with both eyes open. Also shoot off handed at least every other magazine. However I don't put my non-shooting hand in my back pocket!
Because I shoot better using both hands and will use both hands in an actual self-defense confrontation
if I'm able, I do practice two handed. It just seems likely that I'll need that other hand for something in an actual situation. Otherwise, if it's daylight and I'm at home, I may reach for a carbine. For me, its a Marlin 1894 in .357.
But the few times I've had to grab a firearm to investigate, it has always been a handgun. Usually to be discrete and to have both hands free. Thankfully, I've never had a serious confrontation. I was burglarized once while not at home and had to dissuade a "person" who was on my sister's back porch to cease trying to gain entry. I chose not to try and detain him, but I got to ride with the cop and we caught up with him.
I definitely agree that shooting one handed is more fun and I would submit that it may be more practical. However, I would think either accuracy or speed would be diminished if time is a factor.
It does seem like everything old is new again eventually. At the least, not being able to shoot a handgun proficiently with only one hand does take away
one of the handguns primary advantage over long guns. Or is it spelled longgun? Is longgun even a word?