The basic problem here is the same thing that I and others have posted numerous times every time there has been a major or minor system change.
The ROM *you* like is going to be up to you. There is no best ROM for the DROID - your usage patterns are going to be different from mine, your app installs are going to be different from mine, the hardware is even going to be different (not from a manufacturing POV, but from an assembly line POV, where not every piece of hardware is identical - some will CPUs OC more easily, some some will not, etc.).
It is a fallacy to ask which is the best - but the responses here are still within reason, as long as you realize that each person responding is giving you an opinion, not fact - even if it is factual information they are presenting, in terms of battery life and / or speed, you have to realize , it is factual information for their phone ONLY.
Very few responders here can say they have used the exact same install on multiple OG DROIDs, and among those who do, I'll bet not more than 2 can say they have used the exact same install on more than 5 DROIDs in their possession.
What works for you may not work for someone else, and what works for them may not work for you.
Since most ROMs can be customized one way or another, your best bet is to play around with ROMs yourself. In the GB class, I've only used Cm7 nightlies, since the OG DROID is hurting for RAM, and I do a lot with my phone that is *not* gaming related. It's stable, and mostly works - but again, I don't game, but I do a lot of other things on the phone.
The one thing I have found that is awful is the heat when I use navigation - it overheats almost incessantly (thanks to my dock being in the windshield b/c my new truck has no way for me to place it where it is viewable and still out of direct sunlight, and I live in the South). But, since I have to OC in order to really run GB at all, I have to suffer until I can get a new device that will run GB more easily.
HTH