Don't announce your theme/who you have/your playlist. Let your recipient experience some surprise!
Themes are not necessary, either. Everyone can do what they want.
Donald, I was thinking more in the framework of a typical mix but if people don't object I certainly don't.
I have 2 mixes ready. They're quite similar, but I just couldn't cut it down to one. So it'll either be mix A or mix B.
I'm going to wait, see who I get, and then try to make a mix full of stuff that I think that person would like, but may not have heard before.
I didn't consider others at all when putting together the mixes. So fuck y'all...I picked stuff I like. I thought the point was to make a mix of your choosing before you found out your recipient.