Torque is the most amazing app ever if yer into vehicles. Been espousing that app for a while now. Even amazed one of my mechanics with it.

I too use Pandora for tunes, as well as Grooveshark. Soundhound finding names of new songs I hear on the radio or tv. There are too many good apps for music, but those are some of my faves.

Google Latitude and its kin "Maps" and the whole "Car Home" suite is umm.. sweet. lol

I rooted my Droid and tinker with it quite a bit, so of course ROM Manager, Clockwork recovery, Kernel Manager, Root Explorer and Titanium backup are high on my list. As is Samba networking for easy file transfer/sync over wifi. Wifi Explorer is also amazing for that.

HBO Go is a killer app if you have a subscription to HBO. Nothing like watching movies and my fave HBO series while waiting for <insert annoying wait time thing here>.

WiFi Analyzer is good for wardriving, signal analysis.

The Torch app is fantastic if you have a dual LED flash like the Droid Incredible does. It is retina burning bright, I use it daily.

I use Quadrant and Linpack for benchmarking performance across ROMS, kernels, Android builds and devices.

Google Sky Map is awesome for astronomy, but if you have a couple bucks "Star Chart" is better.

Game wise I have Defensoid and Tower Raiders, of course Angry Birds, Can Knockdown, and Fruit Ninja are must haves. Air Attack HD is a fine arcade style game with amazing gfx. There are really too many to mention in this category.

For shopping, Barcode Scanner of course is a must. I also use Home Depot's app and Autozone's app. An app simply called "Coupons" gets me deals on local stuff as well as the latest low gas prices. If I used customer loyalty cards I'd use "Key Ring" to store all them so my discounts could be scanned right from my device. But I don't use loyalty cards. Its a great idea anyways.

Most other things I use regularly are more esoteric networking tools that can be invaluable on my job.

The Droid never ceases to amaze, amuse, inform and entertain.