TS-E 17mm L
MP-E 65mm
200 f/2 L
This year, I was able to acquire my first dream lens: the 85mm f/1.2 L. But as with so many people who can afford such lenses, I find myself lacking the time to use it enough because I'm always working. It's a vicious circle.
Even if I had the money for a 200mm f/2 L, I don't think I would get one because I'd be paranoid about damaging it. I wouldn't be able to relax while I used it. It's just too precious. Hell, I'm already paranoid with my 85mm f/1.2 L.