Yeah, I was reluctant to take service jobs in my groups at first, too. And a lot of it was the accountability I didn't want. But after doing it for awhile, it starts to feel good that others can count on us for stuff. I know I spent a lot of time being irresponsible, and it's good not to feel that way anymore.
Keep pushing ahead--I think hitting a bit of a plateau now and then isn't so unusual. Push past it--and the people who are giving you advice might be right on the money.