Although lifestyle isn't everything, you essentially sacrifice the benefits of the schedule once you decide on IR. Yes, someone has to do it. But where do you want to be at 2:30 am on Tuesday night?
That's not to say that you won't have to do that in DR. But you can pick a job where you don't have to do that.
I think a lot of people would say that just being on pager call ruins the day, even if you don't get called in.