I'm voting cool, not based on fashion or even functionality, but based on the fact that my first 'proper' mountain bike had a selection of Altus (mainly C10 but with a hint of A20 whoa!!) which was the son of GS.
My first mountain bike also, of course, introduced me to mountain biking back in 1992/93. I f*cking loved that bike (a Univega Rover T2.5 in black chrome don't you know) and the adventure's I had on it, with it eventually looking like mutton dressed as lamb with the amount of mid range red ano fitted, it also had braces and dandruff in the form of the crankset and the clockdial shifters. But I loved it, and it made want more....
It also never ever broke, more than can be said for higher end stuff I've used over the years.....