Haha, I like the split in the voting right now...
6 for one, 6 for the other, and 10 in the middle.
for me, handheld is just far more comfortable.
I don't need to worry about the weight of a vape tipping my piece, and I find that I always have to hunch down or similar if I let my pieces sit on a table...
I don't like to hunch over because it feels like it puts that little bit more pressure on my lungs while I'm hitting my piece...
I most often vape sitting on a couch, or sitting on my bed, and a handheld bubbler is the best option for that IME.