The cranky wolves are really great. But I like Fang the most because he's really nice when I had him. I actually miss my Fang after he moved out all of a sudden when I stopped playing for a month and a half.
I really like my Bruce, but my favorite cranky will always be Hopper. I had always had bad experiences with Crankie's in CF (ugh I loathe Limberg!), so I was a little concerned when starting NL and I got Hopper, who doesn't look particularly nice. Much to my surprise, he and I got along well right from the start, and he was such a sweetheart! I ended up letting him move a couple of months ago for a villager I thought was a dreamie, but, though I like her, she and I just still haven't "clicked". I miss my Hopper, and hope to get him back one day.
I have Bruce and I love him! I remember having Octavian in Wild World... I didn't appreciate him at the time, but I think he'd be one of my favorites if I could have him again!