This isn't a pet, but life has been interesting for this guy for about the past 7 months so I thought I'd share the story. I work at a wildlife rehab center, and we got a 4 1/2 foot black rat snake in last June with an infection in his mouth. The side of his head was ballooned up and his right eye lost function because of the wound. We put him on IV drugs to fight the infection and he seemed to be happy with our makeshift enclosure for him. Since then, the infection hasn't cleared up, although he did finally lose the scale that was covering his right eye after two sheds, and he became a "mascot" of sorts for the center. He's been on several different meds since then, but nothing seemed to be working, so he finally had surgery to remove some of the infected tissue in an attempt to restore function in his eye about a month ago. It didn't clear the infection up, but his eye works now, so he went in for a second surgery last week. He's doing okay, and we have him on pain meds as well as a couple of other ones now that the vet gave him, and we're expecting a full recovery soon. We're expecting him to be fully functional again when he recovers, so as long as he can still hunt, we're going to finally be able to return him to the wild. If not, he'll stay with us as part of our educational animal group (most of the rest of our educational animals are raptors or mammals, so he'll have his own niche there for sure if he has to stay).
One thing that really struck me about him is how calm he is. Anytime I've come across rat snakes in the wild around here, they've always been very aggressive when handled. Jeeves, as he's come to be known, is the nicest snake I've ever worked with in my life. He'll gladly sit on your shoulders when you're doing computer work or just hang out while his cage is being cleaned. When he first came in, I was the one who gave the first medical exam, and even then he was as calm as could be. He's never tried to bite anyone (unlike the other wild ones I've been around) or showed any aggression aside from shaking his tail (which stopped after a week or two). He really made me see rat snakes in a different light, and hopefully sometime soon he'll be released back into the wild where he came from.

