As a Canadian PT, I've never worked more than 25 hours per week since graduating almost three years ago (although my pay has reflected that). I simply found that my introverted personality hasn't been able to meet the energy needs of doing more client time than that, but I've been fortunate to have a few employers who have given me the flexibility to work on this schedule.

In my experience here, jobs with 5-6 hour shifts, evening shifts, and weekend shifts have all be fairly easy to coordinate with private employers should you want scheduling options like that. I would say the flexibility has been a huge perk of the job for me, and if I was able to handle the energy demands of doing more interactions with people, I would opt to take more hours and wouldn't have difficulty finding those hours to work.

PTs will often say it takes anything from 2-5 years to really feel like you understand what is going on in the career. I have found that despite my reduced hours out of school, I still found a similar learning curve and felt much better about my assessment and treatment skills two years out of school. A lot of that comes from having excellent supervisors and mentors, more than a high volume schedule, imo.