Hey it will be mainly cheaper/lesser well known guests for me as hey you get more time to interact, in fact 10 minutes+ with a few smaller guests easy. (Note - They are not small to me mind you haha).
No Rush. No pressure with lines behind you and no management wanting it over quicker like many of the bigger guests, who can feel like a cattle line of money. Some who really have no time for deep conversations, some not even a Hello sadly (as nice as many are to me).
Alicia Witt stands out from the last few years for me out of the tonnes of guest's I have met . Literally spent an age chatting, having actual conversation about her life and a bit of fun with passing Darleks as well. Again she is a big guest to me (many may know ger as the little girl from Dune and her from The Walking Dead) but many wont know how nice she can be until they get chatting.
Well worth a meet :-)