I'm allergic to CATS. After I've been around a specific cat long enough I seem to build up an immunity to that specific cat. Any new cat I am around I get very sick, but I have no problem with my cats. Also rabbits (certain kinds- Angora I know) and all rats (even hairless). I can't think what else.

As for non animal things- dust and mold are my 2 biggest things.

Here is a sweet story about love vs. allergies. My sister, Kati, was a senior last year. She went to a private school that was K-3 through grade 12. Kati is allergic to everything with hair and some things without hair. One saturday Kati and my dad were working on a project at school and dad found a caged bunny behind the janitors building. It had no food or water. they went and bought it food and gave him water. Kati went and fed and watered it everyday, she brought him vegetables and treats. He was a beautiful white rex. Kati was allergic to him and couldn't clean his cage, so Justin and I helped her with that. Tho she knew she was allergic to him, one day she picked him up. She got so sick she had to go to the office and get her inhaler. When they asked her what made her sick she said that she couldn't tell them. (Stupid choice of words, Kati, now you have to tell them.) The forced it out of her that she'd been taking care of a bunny that was on school property. They had no idea that he was there. Turns out it belonged to the janitors 8 year old daughter who forgot about it. Kati begged for them to let her have it, but they wouldn't give him to her. She continued to visit him everyday (even on weekends). Until one day the principles wife gave Kati a little white stuffed bunny and told her that during the night the bunny had died. Kati was crushed to say the least. Despite her allergies and asthma she love and became best friends with that little bunny.