YES. I work with a really, really great group of people. Interesting, smart, well-read, fun, and active. My bosses have been my mentors, not just for career skills but for personal development as well. We have kept in touch from previous companies to now and I know at least some of us would keep in touch in the future.
I haven't thought about it too much because I have five more years, but I know when it gets closer I will probably worry about suddenly leaving this whole network of people that I have spent so much time building up. These are people who have called me when a job opened up they thought I would be good for, and promoted me beyond my "experience" because they had faith in me. They been such a huge, important part of my life so I know I will miss them, a lot.
But I guess that doesn't make me any less ready to move on. I still don't like going to work every day...