I am currently running a set of 31x10.5x15 BFG AT's for on-road travel and a set of Les Schwab cheapy 33x12.5x15 siped that I use for offroad.

My favorite tire of all time is still the Yokohama Geolander MT+. Handled really well in Moab, handles really well at Land between the Lakes ORV park in Kentucky. As soon as I wear out the 33's I am getting another set of Yokohama's. They aren't nearly as expensive as say the Firestone and the BFG's.
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2000 Chevy Tahoe nothing special. 1990 Isuzu Amigo, 3" lift, 31x10.5x15 BFG All Terrain (Street), 33x12.5x15 (offroad), Pacesetter header, some ATM rash. More mods to come......