Lol Hawkfish. Yep, there was A LOT of hard work involved with taking care of animals. Of all 6 jobs I've held so far at this point in my life though, that was by far the most enjoyable and rewarding. It was easily my favorite job, despite all those things you mentioned (oh, and I don't believe I ever got bit -- we had signs on the kennels of the dogs that were aggressive, so as to leave them alone).
I got a cat about 10 years ago from my uncle. When I moved away to an apartment for college, I tried bringing my cat with me, but she hated it. She coughed up furballs constantly, puked even more frequently (especially right next to our bed - it was nasty), and was constantly playing around really loudly at night (since cats are nocturnal), knocking things over and opening and closing our cupboard doors. It was too much. I had to give her back to my parents.