The BFG ATs are great tires, and better on the street IMO than their mudders. However, they have a difficult time cleaning in sticky. thick mud; they do fine IMO for an AT in thinner mud.
For a more aggressive tire that's still very streetable, look at Procomp XTerrains. That's what I'm running now and am very pleased. They don't wear as well onroad as the BFG ATs, but still have a good 40-50k treadlife. They have a more aggressive, directional tread which helps out in "loose" terrains. However, their directional pattern means you have to run an AT spare if you go more than 50 miles from home, but that's not a big deal. The XTerrains are somewhere in the middle of an AT and true mud tire, with performance overall in between as well.