I am different... I almost always find that a break refreshes me and I am stronger afterwards -- especially after the first 4-5 miles... I usually start off up hill and often find myself feeling tired, with my heart rate up and muscles burning after 3-5 miles of constant pedaling. A short break does a world of good and I start back up far stronger than I was before I started my ride.
It's one of the reasons I usually feel more comfortable riding solo. I can stop anytime I want for as long (or short) as I want. And I do take a lot of breaks.
I've always wondered about you fella's who don't take breaks. I always thought it was just a macho thing. Thanks for correcting my misperception!