For me, MUST HAVE apps include (top 3 in bold):
Utils:- AppBrain App Market
- ES File Explorer
- News & Weather
- Allrecipes
- B&N Nook
- ConvertPad
- Diskusage
- ezPDF Reader
- MoboPlayer with codec for ARM
- Super Manager
Games:- 250+ Solitaire (Just for the Beleaguered Castle - I have a >25% Win ratio)
- Gin Rummy (Current Rating 400+)
- Coin Dozer (Level 90+)
- Dropwords
- reMovem (love the Apple app as well!)
- Flood-it! (--ditto--)
- Jewels Deluxe
- Stair Dismount
- Yahtz Me
- Briscola, Italian Blackjack and Scopa (Italian card games!)
Android apps used on unrooted ASUS Transformer, rooted Nook Color, rooted White PanDigital Novel and rooted LG Eve GW620!