For around 15 years, I travelled the country with the job (Hit Man for the Revenue), and tended to stay where possible in pubs in Camra's Supping and Kipping guide, but then we started working in teams, and went away mob-handed.
I never had a problem being on my own, because I went back home every weekend to my family.
There's always some time in your life when you want to chill out on your own, so it's nothing unusual. Not everyone has the herding instinct.
I've just (2 hours ago) booked a week away to Majorca 2 days after the end of the season. This will be the first time since my wife died 3 years ago that I have been away for more than a couple of days on my own. I'm both looking forward to it, and am also apprehensive about whether I've made the right decision. Things change as you get older.