Well when I was younger (high school, etc.) I was interested in forensics. At the time I believe knew more about the subject than your average pathologist. Later, when I went to the university and had to study such things anyway, my interest subsided though I still know too much to most people's taste.
Always been interested in clinical medicine though I knew that I will be rubbish with patients so I chose laboratory work instead. For some reason, most people I know are scared and disgusted to open a book of clinical medicine so whenever at my job somebody needs to come up with clinical synopsis (writing a project proposal, etc. - happens quite often) it's always me who does it. I strongly suspect that they think that it's because I am tough and insensitive but the truth is that I think that one needs maximum amount of information to obtain best results so it would only be natural to know how a disease looks like in order to be able to recognise and manage it. I've tried to explain a couple of times but it is only my bosses who actually get it, colleagues usually shudder and turn away. And mind, we the staff are all supposed to have studied the same subjects in the university.
Also, nuclear factory accidents. I can spend hours figuring out how exactly the accident happened and when was the precise moment when things got really out of hand.
I have three tarantulas and would very much like to have a scorpion too. I know that this is generally considered creepy or scary, but tarantuals are actually handsome and docile. Anyway, I've had about a dosen of tars for the last 11 years (and, apart from those who died in infancy or those who turned out to be male, they all lived to a ripe old age) and I never had a bite or any kind of trouble with them. While with each of the three dogs I've had there's been a couple of accidents - usually when they get into a fight or need to be taken to a vet. Come off it, what could be scary about a spider, even a very large one? Or a pretty shiny snake, for that matter?