My husband did docetaxel last summer, he did great! Just "tired" but ADT does that too. I didn't mind rubbing his head while he'd take a nap on the couch each afternoon! (mostly after a week of the infusion)
A funny side effect he had was hiccups from the steroids they gave him- first a pill the night before then one in the morning plus some right before the infusion. The first 24hrs on the steroids he was like the energizer bunny! But after the chemo maybe 4-6hrs later at night, he got hiccups that wouldn't go away, he tried everything! nothing worked, I think he was up to 45 min of it or over an hour! It was after hours so Dr couldn't help, we messaged a nurse friend and he suggested breathing into a paper bag (or zip loc) until you can't stand it anymore, to the point of gasping for air! THAT worked! It happened several times after each infusion and my husband had his baggie with him even when he'd wake up at night to pee, the hiccups started again!
Of course there's a PILL you can take now for it, but he didn't want to take anything MORE! so the bag worked!
After round 2 or 3 he started losing his hair in chunks and shaved it off, he even had smoother legs than me after I shave! (not fair LOL)
Once the hair came back after several months (more around Christmas time) it was a lot more grey than before- I think he looks great!
He still tried to go to the gym every day during the chemo season but did take some days off also because we knew the gym is probably germ central!
We bought the chemo mittens and booties on amazon and used those, he only got tingly toes (neuropathy) near the end and it took a few months to go back to normal.
So all this to say I think docetaxel is a "beginner" chemo and not that harsh.