Again it's all relative.
When I was a med student I wanted to love radiology sooo bad. The pay & lifestyle are great! The only problem is that it is sooo freaking boring...for me at least. And what happens when radiology pay falls - as it is likely to do? I for one am glad that there are others willing to sit in a darkened room all day for me, and that I don't have to do it. Also, I always wonder why the radiology residents are so damn grouchy whenever you page them regarding a study? I thought they were supposed to be do damn happy?
Optho is pretty cool, but way too specialized for my tastes. The routine would kill me.
Anesthesia, again, way too boring for me. All that sitting around in chilly ORs, not to mention having to spend so much time around surgeons...no thanks.
Derm! "Ooooooh, a rash! Let's get you some steroid cream for that, shall we?"

Noooooooooo thanks!
It's like I said - "different strokes for different folks."