I love riding with my husband, even though he scares the s**t out of me sometimes. He is stronger and fitter than me, I am the voice of reason and do my best to ensure he doesn't damage himself (too much) more. I am always conscious that I am slowing him down on the hills and feel a bit bad about that sometimes. He is my regular riding partner.
I am usually the 'leader' when I ride with him or with our 'drinking friends' social group (generally blokes who don't ride as much as us), purely because I've ridden more routes locally.
Because of that I also love going out with the girls because they're far more experienced than I am and know what I am capable of, they can pitch their choice of ride at a level that's feasible for me but just challenging enough. It's an entirely different dynamic and I enjoy riding with them just as much, but in a different way.)
Then I can take that new knowledge back to my rides with hubby and the lads. (J's brother won't ride with us any more - he thinks we are deranged?!?)