These days I almost always end up using the OH1 mixes from the quick start folder.
Always using the same mixes really keeps things easy and it allows you to quickly find the cab that fits the tone for the song.
A couple of my favorite packs:
I mostly use the California Duo and the Heavy Hitters collection.
You simply can't go wrong with those.
Next to that I also really dig the Orange 2x12, Diezel, all the Mar-CB options, the Engl and things like the Bogner OS 2x12.