With mention of most of our phobias are fears, I thought i'd post again...
Fear of needles (or injections. Sometimes anything sharp) - Started when I was 4 and had a blood test. I've pretty much hated needles since. I remember when I had to have a meningitus jab, the first time they tried to give it to me, I was crawling along the floor with my mum holding me by the legs, trying to get away from the needle, and I was crying throughout. They finally gave up and gave me a different time to get the jab. That time, it took 3 people to pin me down to the floor so they could give it to me. That was my last injection, and I was about 10/11. I get really uncomfortable if someone is standing near me with anything sharp, and get thoughts of people going to stab me with them. Doesn't help when during my English class, the guy sitting next to me would get out a swiss army knife from time to time...
Dinosaurs - The most realistic, the scarier. Won't go on Dinosaur, ever. TV shows about them scare me. Never watched Jurassic Park due to the dinosaurs... Things like that.
Heights - Looking down from them. Not much to write here, other then feeling uncomfortable looking down from heights.
Scary stuff - Obvious

I'm kinda a wimp. Things that are meant to be scary will most likely scare me. I have a list of things that scare me at WDW. I won't watch horror movies, because they scare me. I just don't like being scared.
Spiders - Not me (sometimes...) but my sister Ellie. I'm pretty sure she has arachnophobia. She's so scared of spiders, that even the most cartoonish looking spider will make her scream. She'll freak out about the tiniest spider being in a room, and won't even enter the room again until it's certain the spider's not in there anymore. I've seen her standing on the corner of a sofa, cowering in the corner, crying, when a spider entered the room and she couldn't leave because it was blocking the doorway. Things like that. That's a phobia, right?