Me too. Anything that I can train away from class I prefer to do on my own, whilst reserving class time for stuff I can only do with other people. It's good to do a bit of form work in class every now and then, though, just to get mistakes corrected.I much prefer to train SLT at home, in front of a mirror, slowly, while saving as much time in my class for the way our class is currently set up.
It was only recently I found somewhere to train that had mirrors and it is so much better. I can finally see when my shoulders are lopsided and my fuk saus are off to the side etc.