You are kidding right?
If you are looking for a recommendation where to spend your money, this is the place. If you are looking for DIY, you are in the wrong venue.
Examine the thread, "what's the next upgrade for brand xxx CD player?" for example. In a blink of an eye, many will give their advice and opinions as if there's no end. When there's a problem later on however, very few will respond and actually help. Does that define a DIY "friendly" community to you?
The majority of people who frequent this site are here to check what gears they can buy, not to seek sound technical advice. If you are really serious about DIY, then participate in the diyAudio.com forum. There is a reason why the majority of people who really know what they are talking about are no longer here. It is not an act of God. I am glad however that some of those people who, after 5 years in this hobby, I still follow their guidance regarding certain issues, stayed. DougDeacon, Mr. Albert Porter, Ozzy, Shadorne, Herman, Bombaywalla, Kurt_Tank, Newbie, Rauliruegas etc. to name a few. I really miss seeing TWL, Abex, Subaruguru, 4yanx, Ed Sawyer, Avguygeorge, WarrenH, Gunbei, Herman, musicdoc, Couugar, and many more however.
Ahh, those were the days.....