But not as many as, say, the lack of breathing would cost, is what I understood.
Not being conscious / sentient at all is IQ 0, which is -200 points assuming a human standard. That is quite a lot more points refunded than any advantage in the basic books costs. Doesn't Breathe is something like 15 points, but I'd have to check my book to be sure.
GURPS absolutely has quirks with the costs of traits, but it's not
that broken.
Playing as a muffin would likely make your character cost a massive number of negative points, unless it had psionics or magic or other paranormal abilities. I guess if you're playing as a muffin, that would almost be mandatory.
The thing about it, is while GURPS
does support doing that if you really want to for some reason, in my experience it's pretty rare. Most games are about humans who might have magic or the odd cinematic ability, but playing as sapient food is mostly relegated to joke characters. Of course, there's always that one guy who goes out of his way to stretch the lmits of what the GM says is permissible...
To address the OP, I really don't have any suggestions. GURPS doesn't narrow down the possibilities of what kind of game you could play much at all. The players on SJ Games' forums have done a lot of conversion work for a variety of settings, so even Star Wars, Star Trek, Fallout and more aren't that hard to get into if you go looking.