Posted this before regarding saddles so will just cut and paste :-
Saddles are a very personal choice. One man's Specialized bum may not be like another man's Fi'zi:k Arione's bum.
I went through quite a few saddles on my road bike, tried an Arione which a lot of folk rave about and found it akin to sitting on a razor blade. Then I tried a Selle Italia SLR and it was even worse.
Finally settled on a Specialized Alias 143 and I simply cannot praise it highly enough. I can ride for mile after mile on it without thinking twice about comfort of the backside. It's my "Holy Grail" of saddles.
I did eventually bite the bullet and get my bum ( or rather my sit bones ) measured in Evans before I bought it. As far as MTB saddles go, I've been happy with my Cube Acid's OEM Scape saddle but then again, I very rarely ride the MTB over 50 miles, like the road bike.
And yeah, the right shorts make a difference too. I've got a fair amount of bike kit hanging up in the wardrobe ( much to her annoyance
) but I have my "favorite" bib longs, three quarters and shorts. By far the most comfortable are a pair of three quarter bibs in Pinarello DMT team colours made by Giordana. No idea why as the pad isn't anything special but they just are. And my Endura Thermolite bib longs have a very comfy pad compared to my PBK team bib longs. I guess some of it is a perception/placebo type of thing but the bottom line is ( excuse the blatant pun
) the right shorts coupled up with a saddle that fits make a huge deal of difference to comfort and indeed enjoyment when out on the bike.