Regardless, over the past year I have found myself buying more plug-ins and I have to say I've found some really great ones.
Honorable MentionsButt Capper - Easily add caps to strokes in After Effects. Seems simple, but it's seriously so helpful.
Dojo Shifter - Easily sequence layers in After Effects. Another simple but effective one.
Motion - A robust plug-in for adding different motion to your elements using only a simple interface. Good for making complex motions easily.
Pixellate It - Simple for giving a pixel look in After Effects
Boil It - Simple for giving a wiggle look in After Effects