Toyo and Nitto should be grouped together, seeing as how Toyo owns Nitto. Hell, a lot of their tires are all manufactured in the same plants.
I personally have no particular preference, any NAME BRAND is going to make an awesome tire, you just have to know what you're going to use it for and the climate you're going to be driving in. In my area, there's no need for an All-Season tire. I stick to Summer Tires on both my car and my G/F's. I have Bridgestone Potenza RE760's on my MX6, and Continental Extreme Contact DW on my G/F's '09 Focus SES. Both are awesome tires.
Make an intelligent decision selecting your tires, and you'll like whatever you put on. It irks me to no end when people complain about their tires when they use them for purposes outside of its function, or complain that their tires wore out too fast and equate that to it being a bad tire.
Store Manager at Big O Tires in Newark, CA!!