To a large point i do care about going fast, however riding fast only has an appeal if it provides the element of fun i want to experience.
If i go fast whilst solo riding it gives me less fun, therefore isn’t important.
If riding in a group i strive to be the fastest rider there, either to push myself or to push others a little beyond their normal comfort zones.
I’ve found when descending in a group i tend to go first, i begin to check behind me and either i speed up to try and loose the person chasing or i slow down to let someone catch up, draw them closer then try to get them to stay with me as i wind up the speed.
If i’m mid pack, it’s the chase, so if i catch someone i’ll slow up to let them get a few hundred metres on me, then go try and catch them up.
Not sure if all this is showing off, trying to push my limits.
It’s never been about the bike for me, it about how i ride. Some times the hardest line is more fun but slower option, but more FUN, other times riding smooth through an easier section feels more fun because it faster.
So yes, riding fast to me is important, but never has a bike made me feel to ride faster because of design.