I have one of each, and they each serve a different purpose. On the rare occasion I am hunting from a vehicle (like while hunting or scouting for pronghorn), I much prefer the straight because it fits in my window better and I don't have to crane my neck to see through it. I also like the straight because it fits better in the "spotting scope" pockets on backpacks much better than the angled. When they add pockets for spotting scopes on backpacks, all of the ones I have found will only fit my angled spotter (it's an 82mm) if I take the eyepiece off, and I don't like doing that because I try very hard to keep the lenses clean and scratch free.
I do like the angled for glassing while standing because it is more stable, and I don't need a tripod that's as tall because the scope can be mounted three or four inches lower than it would need to be for a straight scope. I am a taller person, and I definitely prefer the angled scope when standing. The angled one is also easier for me to take photos through, so I prefer it for that purpose. Overall, I would say the only thing I don't prefer about the angled is that it is a little harder to pack, and it is harder to mount to a vehicle window. Other than that, the angled is my preferred version.
