I've tried so many bases over the last 30-odd years that I've lost count (though admittedly 30-odd years ago the base concept was not so widely disseminated), but in recent times the ones I regularly make and enjoy good results with are (in no particular order):
Zaal/Little India, CA, CT, C2G, Taz.
I say "no particular order" because these days I tend to borrow a little of what I know to work from each, plus a few tweaks of my own, to make a base that suits my predilection for the hot and spicy. I'm sure that many of you do the same.
But as I've mentioned before, I sometimes go back to what I like to think of as the 'Ur' base, which is simply onions, garlic, ginger and minimal spicing to create a 'neutral' canvas upon which to wreak artistic havoc.
Damn... What a load of crap I talk sometimes... None of that really helps, does it?
Perhaps I should think about canning the heavy morning drinking... ;D