I have never been to a convention, nor probably would I ever, even at that I cannot remember one in or near Glasgow, Scotland.
Having said that, there are some "difficult" actors here mentioned that I wouldnt cross the street to see or meet.
Those being, Beltran, De Lancie, Frakes to name a few, but it would dismay me and even hurt if I did end up at a fan event and met Shatner for example, and he was a cock.
I would like to meet the cast of Enterprise, but note that Blalok is described as an "airhead", thats a bit disappointing.
Picardo, Auberjonois, Spiner, Nimoy would interest me greatly, but reading reports on here its probably best that I will never meet them, only to be underwhelmed.
Also, the fact that so many con goers are dressed as Cardassians, Orions, Andorrians and God Forbid, Klingons, must be very, very offputting for some of the actors in question, I mean surely you can be a fan of Trek without dressing like a dick ?