A few thoughts on zooms, which nobody seems to have mentioned so far...
I travel a lot, and light weight and small size can often be a big advantage to me and can outweigh the slightly inferior performance that we expect from zooms, so I have a few.
I've been through three of the 35-70 zooms. I had the f/3.6 at one time, and that's superb - I'd say the results are largely indistinguishable from the equivalent primes. But it was really too big and heavy for my use, so that got sold.
I also had the ubiquitous f/4 for a while, at the same time as an f/3.5-4.5. I thought the f/4 was probably marginally better optically, but I preferred the smaller and lighter f/3.5-4.5 for carrying around, so thats the one I kept - the f/4.5 isn't much of a problem for me, as the lens is really only for occasional use in tropical lighting. (There was also a "budget" f/3.5-4.8 at one time, but I've never seen one of those).
As a companion, I also have a 75-150/4, which I think is a pretty decent lens - I like that focal length range, and again it's a case of being a good enough compromise when I don't want to be carrying an 85/100/135 combination. I find it useful for public events and crowd occasions, where speed and cramped conditions are hindrances to lens-changing.
But for me, the star of the tele zooms is the 100-200/5. I think it's a cracking lens, and really isn't too heavy.
I've also had the 35-105 and 65-200, but both of those were too big and bulky for me and so they didn't stay with me for long.
I also have a 28-48/4, but for some reason I've hardly used it. The few results I've had look fine, so I should probably stick it on a body and carry it round for a while.