I got to know Linux back in 2006 in a hackathon-type-of-thing at uni and they gave me a Ubuntu 5.10 CD and my jaw dropped with the cube animation thing.
Ended wiping my hard drive trying to install it, finally could install it, tried XFCE for a time, went back to GNOME, was tired of Ubuntu and tried Gentoo and somehow could install it, with the GNOME3 drama moved to KDE, considered FreeBSD for a moment just to realize pkg/pkgsrc is absolute shit compared to Portage.
Oh and it seems KDE went back with the cube for Plasma 6! Alas it's still masked in Gentoo and who knows when it would be ready, but it's a bit great I'm not the only one for that cube nostalgia.