Sketch roundup

Been slammed with work, I manage to get some sketch time in on the commute and at home after the baby nods off...

Bus sketch... Started out as a study of negative space, the scale went a little wonky here and there as the drawing was done over a couple different sessions (different buses, same model... took a heck of a time to get in the identical seat position though):

 And here are some doodles of ships n' robots: