Welcome to the fold!
Although I have moved on to a Galaxy S3 as my main phone, I still use my Touchpad on a daily basis.
Definitely go with Preware/WebOS Quick Install. i also used Google Calendar Search, Simple Bible, Accuweather, and Carpenter's Level.
For games: Angry Birds (of course!), Super KO Boxing, Battleships (free), Pribbage (free), Glyder 2, Air Traffic, Mini Golf, Blocked, Scatter, Farkle, Ancient Frog (the best!), Quell, Code Breaker, Zilch, and Woodenigma.
Utilities: Dr. Battery, Govnah, Save/Restore, Luna Manager, Internalz Pro, Tweaks, and don't forget Developer Mode!