Hmmm... I think the answer is subjective.

There are a number of factors involved. Obviously, road conditions matter. Ive owned a lot of bikes in my riding career. However, none had me paying attention to every detail of the road like my Pitbull. If you have a bunch of shitty roads where you're at.... you wont like it. I have a shitty road out the back of my subdivision... I dont ride it.
Age/physical shape matters. If you are in great shape, no aches/pains/problem areas, you'll take it better than some of us. Im a pretty active guy at 40. I ignored the "discomfort" at first. It was cool, & that's what mattered to me. After some time went by, I found myself riding my Harley more. Why... it didnt beat me up near as bad. I would get really nervous on the freeway.... say 70mph, in a turn, over a bridge...
I had my seat done last year. I had a custom setup fab'd, that added springs, & a soft seat... WOW what a difference. I really enjoy it ALOT more now. I have already put more miles on it in the 6-7months since I did this that the previous 12-18 put together. Im in love again.
This link shows the thread where I had it recovered for looks, & includes the thread showing the fab--->
RoofDude's seat
As far as a passenger...... never had one on my Pitbull

My OL wouldnt get on it. I dont blame her. There is really nothing to take the bumps except ass. She wasn't interested. Although, she has no problem riding on the back of my Harley. So, I cant speak from experience with a passenger but, it dont look comfy
I bought my Pitbull new in 2004. I bought it cause to me it was the baddest looking bike I had seen. The performance is lights out. I was in love with it from the moment I laid eyes on er. After the "honeymoon" was over, I started to hate the bumps yet, still loved the bike. So, it became more of a barhopper for me. (7yrs ~ 5000miles

) Now, with my new seat setup, Im riding her more. Im liking the ride, & still loving the bike....