In my personal experiance, pecan is far milder than mesquite and hickory. I think of it as a mild fruit wood that happens to make great BBQ.
If I was given one choice of woods, I'd choose Pecan every time. The aromas coming off the pit is heavenly.
When Aaron stated in one of his videos that Pecan was a strong flavored wood, I lost a huge amount of respect. He's obviously never used it. Pecan is mild smoke wise, with an amazing aroma that will entice the whole neighborhood over to your house.
Modded Brinkmann Gourmet. Basic UDS. Rescued 22.5" OTS. SJS Mini-WSM. Stubbs. B&B Oak Lump.
Cannondale 2009 F8 (for burning off all the great BBQ)