It's really tough here. San Diego County has 13 of the 17 biomes (types of ecosystems) that exist in the world. AFAIK it's the most ecologically diverse county in the US.
We have everything from forests to sand dunes, grasslands to chaparral.
Something like Natural Gear is a decent catch-all. I have some of that.
Mossy Oak Brush is good stuff for fallow fields, grasslands, etc. I have one of their Trek-Lite shirts for hot weather, and it's great! Max-1, Desert Shadow, etc. are good, too, but I don't currently have any.
Most everything comes in MOBU, but that's not the best in most places here. Too dark for the sandstone Southwest, at least anywhere even partially open. I have some, because that's what something (e.g. a backpack) comes in.
I have a little Max-4. That's also good; covers shorelines as well as farmland and even semi-desert pretty well. Shadow Grass is too specific for most areas here; even lake shores can be brushy, not grassy.
Most people I hunt with, or run into in the field here, have a mishmash of camo types, often all at the same time. I've been places where 1 or 2 kinds of camo would cover just about everything you'd want to do. This isn't one of them, unfortunately.