A starter is also a great way to make your yeast go farther. Every time I've used a liquid yeast I've saved the last little bit and used it to build my library.
Primary: Apfelwein w/ fructose, Apfelwein w/sucrose
Aging: Matt's Mega Cider, Raspberry wine, Unfiltered Apple Cider
Bottled: IPA, Hefeweizen, Magic Hat #9 clone, CCA, Apfelwein, Panty Dropping Apple Cider
Kegged: Belgian White PM, Orfy's Hob Goblin