Red or Blue? Favorite trail?

So I rode South Mountain for the first time on Easter. I stayed on the alpine(orange) trail the entire ride. Boulder (blue)trail looked insane. I didn't pay much attention to the red trail. I'm looking for some feedback as to how difficult those two trails are in comparison to alpine. Also, what is your preferred route? For example I went counter clock wise through alpine. The uphill was tough, but the downhill made it all worth it. I loved flying through all the rocks at the beginning of the down hill section. :cornut:

Thanks in advance,
Chris