My fursona has done a lot of changing since it was first formed. Initially, it was a reptile (and occasionally, you'll see me sporting reptiles for that reason), but now that I've grown and recovered, I picked something more common place.
I've grown very partial to canines, but I don't find myself identifying as anything 'wild' mostly because I tend to like the aesthetic of the domestic dogs better. So anyway, onto the meat, I picked a bull terrier because they are very much like me in personality and appearance.
Personality wise, they're independent and stubborn, usually not good for first time or inexperienced dog owners for that reason; if they tag you as someone beneath them, they're likely to do their own thing and ignore you. They're intelligent, having to be stimulated both physically and mentally less they become neurotic or destructive. Clownish and rowdy. They talk to themselves when they are bored. They are predisposed to having neurotic tendencies, including scratching and chewing. They can also be guilty of shadow chasing, or seeing things (which I sometimes deal with), and can look imposing despite being enormous dorks. In all they're pretty much a handful, but need consistency and for people to remind them (kindly) that rules exist. Literally all of this applies to me as well.
Physically speaking, I keep my hair short, and bullies have short coats. We're both thick and are easily prone to sunburn. And of course, we're both handsome, so no skimping out on that. Specifically with my fursona, I have the fawn coat to match my dirty blonde hair.