I feel indifferent to the fish. I would find him more interesting, I think, if he spent more time with our main characters.
That said, I think I'd like AAtF a lot better if our main characters spent more time with one another or were at least more clearly defined (which ones are major and which ones are minor, I mean), so I'm not sure I can blame the fish so much for being kinda isolated when, right now, all of the characters feel rather isolated. I think there are too many characters and that's why I'm not really feeling George, you know? In like every issue, a new character is revealed. It's hard enough to follow Angel, Wes, Lorne, Connor, Spike, Illyria, Gwen, Nina, Groo, Kate, and Gunn on their different and sometimes intersecting adventures all over the city; with all of them so scattered, I really don't have the mental capacity to care one way or the other about someone new. I wanna know who the main villain is, who Angel's main crew is, and then focus on those people. Right now, there are too many characters claiming my attention -- and the fish is sort of at the bottom of that list as far as importance goes.