I thought I would start a thread for all those who have been trying out the different ROM's to see which once you've been getting better results on. I have just started testing one so I'll post some results after using it for a few days. You can either add a picture or just post the results.
For my quick test I think Gummyjar Nexus 0.4.2 has given me the better battery life; coming in 1st. This is based on a less than a day test so yes it's not a good test but that's what I noticed. I'm on the Trianquility Ice 5.5f now and the battery life has been good; comes in 2nd. Axion 2.3 is third based on my quick less than a day test. I use my phone alot and will consider myself an above average user. For now I'm flashing too much to really gage a normal day battery life so again I won't provide stats yet. The listing above is me setting up the phone, playing around and testing things. Not really my daily pattern.
To make it clear if you're posting a 24 hours of battery life try to give us some insight as to how you got it. Are you really using the phone or just letting it sit? Are you using the web, surfing, emailing, texting etc? How often? Do you consider yourself as an average user, more than average or below average?