Straight for me. A lot easier switching between binoculars and spotting scope with a straight. Angled definitely has a few advantages though.
+1
I don't find a straight to ever be better than an angled. Not switching back and forth from binoculars or in a truck with a window mount
It's a preference thing. I definitely like straight spotters better, in general, but find angled scopes to be advantageous in certain scenarios.