Windows 7 with Aero Glass, in my opinion, was the last version of windows that actually felt warm and comfortable to use. 8, 10 and 11 all feel so cold, sterile and boring.
But my heart was with the tonka-toy hot mess of XP and themed winamp skins.
One of the main reasons I bailed to Linux is that I got so bored of staring at 10s functional but personality-less interface (which struggled even within it's own constraints to provide a useable darkmode and a non-eye-searing bright mode).
And now I have simple, but human. It's like wearing a tailored suit rather than one off the rack, and in this drawn out analogy, I think XP was like having fun in the dress up box at the back of a charity store.