Pets that have been mine specifically?
Well I had tons of hamsters when I was young. I can't even remember how many exactly. That's kind of saddening, I know.
I also had a few goldfish.
When I was in 5th grade I "adopted" a cockatiel from the school. lol I still have him, and in the summer of 9th grade I got a guinea pig from school as well. The guinea pig my teacher had gave birth to baby guinea pigs, and OMG they were so adorable and tiny... and yeah. I fell in love. XD I ended up with one of the babies, and she is still alive even though she's 4 or so years old now.
I also had a budgie for a while, but he kind of went into my sister's care, when she moved out he was a family pet, and unfortunately he died earlier this year. I don't think he lived as long as he should have.
Ok, I've made a long enough post already so I'll do my list now and shut up. XD
-Hamsters
-Guinea Pigs
-Goldfish
-A Cockatiel
-A Budgie
-Dogs