Beaks - I tend to prefer short and slightly curved, so probably small predator birds.
Big predator beaks (like eagles) are right out - too aggressive looking for me. Also kinda open to reasonably proportional pointed beaks (like, maybe woodpecker shaped?)
Haven't picked a particular bird species though.
Big cats aren't a good fit for the same reasons. Biggest I've ever felt good about is chee, but I think I'm actually more comfortable going smaller, maybe right down to small cats.