I have 1 gate that closes against a post (latch and hinge ends both in concrete).
2 other gates swing either way, and both swing freely open to the downhill side, and enough open to the uphill side for people and wheelbarrows to go through if desired. I use it that way on one of the gates when putting hay out in the Winter. I can also move a single horse through 1 of those when needed, and used to on a regular basis, even while mounted. I’ve also carefully moved a couple horses, one at a time, as I could funnel them through and not have any opening wide enough for another horse to think they could squeeze by.
All 3 are in the middle of a fence line.
The only one which ever stays open at any point is the one that only swings 1 way. When I need to secure it open, I rest the latch end on a piece of wood, and tie it to the nearest fence post which is’t that far away.
It really is nice having a gate that swings both ways if you are moving horses in and out of that gate on a regular basis. That way, while it’s nice to think you’ll never have an issue, you’re never forced to swing the gate into where you and the horse are.
For you, since you still have your corner, I would definitely choose the 2nd option, and even better if it can swing both ways since you’re still in a corner situation. With sane horses, it’s typically not a big deal. But if you’ve got something snorty or fractious going on, it’s nice to be able to push a gate away from you and not pull it into you.