I went from an Env3 to a Droid 3...so its my first smart phone..and I'm completely blown away by it. I absolutely love it and wish I would have gotten a smart phone earlier. I was going to get an iphone 4.. but now that I got the D3 I'm so glad I decided to go with android. So much you can do with this phone! If you like physical keyboards this phone is the one to have at the moment!
I have the envy3 as well (started with the 2 a few years ago) and I'm thinking about getting this phone as well. I need a keyboard and this one seems to be the best to go with. I've never had a smart phone before so this will be my first as well. It's encouraging when I read posts like this.
Let me put it this way...I got my droid 3 3 weeks ago and I haven't put it down since..heck my girlfriend has gotten mad because I was paying more attention to it and not her haha..I especially love it because it takes great pictures and videos , it plays all my music and there are numerous music players to pick from , I can listen to pandora or slacker radio anywhere , I can search the web , check my emails everywhere, news,weather,movie times, get directions, etc , you customize so much on the phone and make it your own especially if you use a different launcher , lastly I text alot and this phone is a texting machine..the keyboard is the best in the market right now and unlike the env3 the phone can hold hundreds and hundreds of messages.
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AND im still finding new things this phone can do via apps.
I highly suggest you move to smartphone if the things I mentioned above interest you. You wont regret it and its definatly worth the money. If you barely text or use your phone and don't care about email , internet , etc then stay with the env3 otherwise get with the times
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) hope that helps!