Alongside the post of The Forest II below, I'd like to put my compositing and rotoscoping demo reel up for critique. Since I've been working on close to nothing but The Forest II for the past couple of years (during which time I decided to become a professional effects artist), all but one of the shots in there are from said film
It has a lot of breakdowns - showing the progression of the shots from raw footage, through element shoots, colour correction and grading to final composites.
Demoreel on Stage6 (recommended)
Demoreel on Youtube