If you'd asked me a couple of months ago, I'd have said "Yes! Very important!" for lots of reasons.....
Now I have a bike that, if I sit and analyze it, has soft forks, too-narrow-for-me bars, a slightly low front end, and cheap plasticky shifters and brakes.
And you know what? I've just spent the weekend riding it pretty hard and as soon as I point it downhill I simply don't notice any of that.....It just works.
Which is very odd. I like a well set-up bike. I like to faff. And I must resist it this time because it's pointless.... (Save for a stronger fork spring for t'Alps...maybe....I'm not even sure about that)
Or have I been barking up the wrong tree for all this time?