You might want to concentrate on projects that are ending soon, or have sub-projects that are ending soon, if you are a badge chaser (WCG, PG, yoyo, etc).
Also, it's always good to stay attached to project with only sporadic, limited work availability. Especially if you have MM goals there.
Some suggestions:
Gerasim (LW)
Sudoku (ES)
YAFU (ES)
volpex (LW)
MindMOdeling (LW)
NRG (LW)
WCG: Help Cure Cancer (ES...also, the only GPU project at WCG).