1. Easier to get on target.
2. Easier to glass from above.
3. Easier to glass from a vehicle.
1. Easier on the neck.
2. Easier to glass up.
3. Easier to use with multiple people of different sizes.
4. You can use a shorter/lighter tripod.
I use angled, because most angled scopes have a rotating color that more or less evens the field with the straight, except about getting on target easier. After some practice, though getting on target with an angled scope is second nature.
I use a straight for the single reason that it's easier to get on target. Sometimes a few seconds is too late... I have no neck issues as I adjust my tripod accordingly. Personal preference. I suggest you try both and decide for yourself. Ed F
I use a straight because I can lay my binos on top and use the tripod to stabilize my binos without attaching them to the tripod. Then it's easier to transition to spotter to further check something out, and spotter is already on target.