Which C. elegans would be appropriate for general study? Would wild type N2 be best or Dyp-11? I know they're different, but I just want to observe the worms to see life stages, movement, etc. Dyp-11 seems like it would be easy to see but N2 is the wild type so I need help making an appropriate decision.

I suspect that that dpy-11-mutants (that's what you likely meant) are not very representative neither from the morphological nor from the behavioral points of view, because they have anomalies in body shape (dumpy appearance) and male tail morphology (see in WormBase and in Ko and Chow).

For a general purpose the wild-type should be best.