In retrospect, we're much less fun and colourful than people were in the 80s and 90s. Everything is so muted now. I do celebrate the fruit flavour iMacs for being so radically different to everything else in the computer landscape, and being unapologetic. From an aesthetic stance, though, I think that the summer 2000 iMacs (Indigo, Ruby, Sage, Snow, Graphite) were more beautiful.
After that, I think Apple got too conservative – the snow Macs aren't bad, but they tend to get yellowed/dirty with time, and don't have the more glossy look of the translucent iMacs.