If I may quote Ozzy's character "The Guardian of Metal" from 'Brutal Legend',
"GO FKING CRAZY!!!"
What you do now is truly make this YOUR phone. Customize it as you see fit, flash diff themes, OC the beast when you're using it, UC (underclock) when the screen is off to conserve battery, find ROMs that have what you're looking for, and cause general mayhem.
When it comes to ROMs and kernels, not every Droid is going to get the same results as the previous one. This means you're going to have to try em all and see what works best for you on your Droid. There's certainly plenty to choose from. To be honest, I've kinda been sticking with the kernels that have been built into the ROMs, as for one, I've gotten lazy, and two, most of those kernels are optimized for those ROMs. But again, that doesn't mean that your Droid will cooperate with one or the other.
Many ROMs now have settings implemented into the ROMs themselves that allow for you to DL new kernels. You can also find them in ROM Manager. There's plenty around and I've yet to see a list of Gingerbread kernels, but I do believe the Froyo kernels will work as well. Here's a list that was complied for Froyo:
http://androidforums.com/droid-all-things-root/98988-froyo-kernels.html