I just had to post in this thread because of the title. It's pretty ridiculous that you'd create a topic on this site as bline007 said and not somewhere else. Especially using that topic title? You didn't really expect that anyone would agree with you I hope. For your sake I can only assume you meant to say "Be careful I've found some 3rd party roms with spyware" or the like.
P.S. I apologize for the flameish response but I feel a lot of patronage for this site and it's members because of the work massive amount of work and personal time they have spent to make my 'legacy' phone go out of it's comfort zone just to bring us features, options and a longevity we never expected from this phone. So please don't taint the hard work of the developers by making posts with titles as such.
Perhaps some 3rd party ROMs are faster than stock ROM (2.1) (I don't think any 2.1+ ROM can be faster). But, you can't compare the stability and energy use with the *pure* stock ROM. For example, I charge my battery once and keep it running for 3-4 days! I have never had any issue with the latest stock ROM. Everything works so perfectly! I don't need to be a flash maniac that flash my phone and re-configure it every time. OTA is so easy, smooth and not painful. A phone is a phone. It is a tool that helps you. I don't really like a phone that drives me crazy, eats my battery, and gives crashes again and again. Personally, a stable smart phone with less but essential and *stable* features is better than one with many more features but buggy.