Every morning: Gmail, Good for Enterprise, Twitter, Facebook, Phandroid News, Market, Engadget,
Every day: Swype, Phone, Voice Search, Dolphin,
Most days: Handcent, Quick Settings, The Weather Channel, You Tube, Gallery, Camera,
At least once a month: Tea Time, Calculator, Volume Control, Google Navigation,
Maybe less than once a month: Taskiller, Jewels, Google Sky Map, Robo Defense, Retro Clock Widget, Astro, Simple Stopwatch, Alarm Clock, Taskiller, MotoTorch.
Apps I'm going to try after reading this post: Flyscreen, Ultrachron Stopwatch.