I've always been fixated on the higher end models: the 800, 800XL, and 130XE. The lower end models, the 400, 600XL, and 64XE, disappear into the shadows for me.
Nostalgia doesn't have to be logical. If someone's first computer was
'low end' Atari model, they'll want to hang on to it or replace it with
the same model if it's gone.
The 600XL also might fit on your desk better than any other Atari. I've
got one with the 64K RAM upgrade (2 chips, 3 wires) and composite video
output. It's the equivalent of an unmodded 800XL in a smaller package
(OK, minus the luma output, when/if I need to use it with a monochrome
monitor it's easy enough to add a wire for the luma).
A 65XE basically is the same computer as an 800XL (minus the PBI port,
if you're in the US). What's not to like?
You didn't even mention the 1200XL, there's quite a few 1200XL die-hards.
I've got one and I love it, though right now it's sitting on a shelf
(again, limited desk space).
A lot of us want to have at least one of each model. Though I admit I
got rid of my XEGS (wasn't using it, someone else is using it now).
The 400 was my first computer. I currently don't have one, but my 800
makes a nice substitute (the 800 was the one I wanted, but the 400 was
cheaper so that's what the parents got me). I probably will pick one
up someday and use it strictly for cartridge games (the crappy membrane
keyboard doesn't matter so much for Star Raiders or Defender).
Eh, I'm rambling now... I guess the short version is, which Atari(s)
you like & dislike is purely a matter of taste, there's no right or