User blog:ClarentBloodArthur/Guest Characters a go go or no go?

Most fighting game ideas on this wiki have a huge and most of the time questionable choices of characters that are from other franchises from other fighting games or other franchises. I want to know from all of you how feel about wanting Guest Characters in a fighting game, such as why do you like it? Why is it a terrible idea? Why, oh god why Parappa the gay Rapper? Personally I'm not much of a fan of adding Guests on this wiki, because adding loads would make your idea look like your typical mugen roster, which is something you wish to avoid if you want to make a decent, serious fighting game idea. I've only once added Guests on one of my ideas (Vampire Successor), that was because both of them met some of the criteria of what I wanted in a fighting game. So then, what do you think of Guest Characters? Do they appeal to you or not? If so why?