Best ROMS
Well like many have stated already, a ROM is a matter of preference. For all intensive purposes I'm going to give you what I feel are the best choices currently (2/9/11) IMO. First of all I rooted into the Sprint Lovers ROM and as a first timer it was great. Smooth interface, better than stock for sure. Wifi hotspot included, also my app killer seemed to work more efficiently & of course with SetCPU I save tons of battery (This is the same for all I'm going to include here so I won't mention again.) My Next thought was CyanogenMOD v6. Clean, Fast, Effective. Personally I like Sense so this didn't do it for me but that is once again IMO. Also I enjoy 4G and HDMI so... Next I tried Fresh's Latest 3.5.0.1 but I got it through ROM Manager so it could be outdated (not sure). Seemed to work ok, somewhat slow to me, Wifi hotspot included, all the good stuff still works. ES File Express came with so that was nice. Probably more stuff I'm forgetting but i didn't spend much time with it too slow for my taste. Next I gave OMJ 4.3 a try & I gotta say I was pretty happy with it. Smooth interface, plenty of speed, and all the other good stuff I've already mentioned so not a bad option IMO. Last I've settled on MIKFROYO v4.5. All I have to say is WOW. Super fast, all the goodies, but the real difference is in the theme. First of all is deodexed so I can theme if I want to (I'm a graphic designer so this is something I really see as a plus). More than anything though theme that comes with is just my style, all black baby. This is truly my favorite so that's what I'm sticking with for the time being. I did momentarily play with MIUI 1.24(?) for a minute. It's basically an iPhone for your EVO. Not sure why people want that I love the android look and feel but if that's something you're interested in give it a shot it seems like many others are.
Long post but hopefully that helps, I may not have given Fresh the credit it deserves but wasn't fast enough regardless so.. yeah.
Cheers.