The light sensitivity thing kind of sucks. I live in a very very very sunny environment (approximately 2m from the Sun, itself), and unpolarized light can give me migraines. I pretty much have to wear good sunglasses to even THINK about going outside.
Inside, I can see the flicker in anything under about 75-80hz (if I concentrate, I can see higher frequencies, but it's annoying so I don't do that). Best I can tell, that's due to fast nerves. (I don't recommend anyone get tested for this...they use an EMG...actually, if someone offers to use one to test you, I suggest you kick them somewhere sensitive, two or three times, and then run.)
Having a slightly higher clock speed than your average bear can be useful, but it actually has some pretty ubiquitous downsides, such as florescent lights (at 60hz) or your average old CRT monitors (typically set to under 75hz by default) being really @#$%ing annoying. At least most monitors and TVs have moved away from damned slow-scanning tubes to LCDs.
-Jn-
Ifriti Sophist