Well, I go on different rides to get different experiences.
For example, if I want...
1) A slow ride where I get to chat- I ride with my Sunday group.
2) To hammer it some- I ride with my Tuesday group.
3) To go the distance and not get dropped- I ride with my Saturday distance builders group.
4) To go the distance and rest every 10-12 miles- I ride with my Saturday no drop ride.
You get the point.
I know that I can't do one type of ride all the time. I change it up often, so I can stay interested and challenged.. and it keep it's fun. If I ride with groups where I get dropped all the time... that is NOT fun.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"