Is it ever acceptable for a partner to tell you who you should or shouldn't be friends with?

Yes. Everyone should be allowed a little compromise before they are hilariously executed!

Sure. But you are setting a bad precedent if you listen to them.

No, but its fair for your partner to give his honest opinion if he feels your friend is manipulative or a negative influence. Although he must also have examples to back up his opinion. I once had a friend who was really manipulating, but I couldn't see it... until it was pointed out to me. Then I changed the way I behaved with her and she cut me off. Problem solved..

Of course if you are wrong someone has to step in

They can give me their opinion.

Nope

No

That depends on the person and the circumstances/situations involved...in some instances I think it would be very acceptable (as well as understandable).

If they're hitting on you/disrespecting your relationship then yeah.

As long as not with the "ex" I don't mind at all :)

If she doesn't like them, fine, I don't have to bring them to her face. If she doesn't stand them I'm not going to force them to hang with them. But my friends are my friends, and it is my choice who I keep as friends.