I tow my son to school on a "trailer bike" and my wife has a child seat for our daughter.
Today, the daughter decided she wanted me to ride her home.
So I cranked up the seat-post as far as I dare and went to get her.
I'm wearing tight shorts today so the geometry of woman's bike made it easier for me to mount.
And the tires of her hybrid were wonderfully slim compared to the 2 inch jobbies on my MTB.
Even though my leg was not getting too far past 90 degrees at the bottom of the stroke, I was powering along
happily, perhaps because her frame is smaller and lighter than mine.
Long story short ... time for a better bike. If a $300 hybrid is more fun than ones main bike, its time for a new main bike!