For most jobs I prefer the stand that clamps the fork and supports the bottom bracket (or conversely the rear dropouts and the bottom bracket). Park makes a couple - PRS-20 and PRS-21 (regular and light). I only have a Blackburn tripod version of those - it folds up to the size of a 3 foot long 2x4 and I bring it to races etc.

I worked in shops for 15 years and we always had the PRS-3 or its double version, the PRS-2. Once at the right height (pretty high for being in your basement or even a standard room) they are excellent - they'll outlast the building they're in. Just twirl the bike around so whatever you're working on is right in front of you.

However, if you don't have it at the right height, you end up with a crick in your back. This is my paranoia. It might have something to do with the first low stand I ever used - the guy who bought it said he saw the stand in an unmanned shop. It was so low it barely raised a bike off the ground - how could anyone work on it? He called out and some old guy shuffled out of the back room - his back had a huge hump in it and he was at virtually face level with the stand.

lol I've always been afraid of becoming that old guy.

With a seatpost clamp stand, sometimes ceilings will limit you - tire or fork marks in the ceiling may not fly for some people (or the occasional light smash). Additionally, with modern bikes, when you really need to hammer on something (frozen BB cup for example) I'd worry about breaking something on the bike like the post or the seat tube (since you always clamp the seat post). Seatpost (carbon or other light stuff) with a long extension going into a fragile superlight seat tube - doesn't make for strong leverage.

Plus I'm little so my post never fits in the clamp unless I move it around. Carbon posts discourage any moving and I never get the seat back correctly.

So for me, fork/bb or rear dropout/bb.

afraid of having a hump in my back,
cdr