For me, I really don't like runners, but I love the Learners. In VV IV, I discovered how great the Learners were and how hard it is to keep a runner on task long enough to even get them to adept. You have to be constantly putting them back at their job. I know you do with the non-runners too, but at least with them they are usually just wandering near the job site whereas the runners are off and gone.

If I could have picked a tribe of all learners, that would be best in my opinion.