It's truly impossible to rank states to everyone's satisifaction. That said, I've been in 'em all except Alaska, and I've come to appreciate the lush rolling green hills of my home state of Pennsylvania.
I also think Big Sur and environs in Cali are special, as are the Outer Banks of NC, as is the UP in Michigan, as are rocky, ragged Maine and Vermont, as are the hot springs and stark Western beauty of Colorado, as . . . well, you get the idea.
Personally, my journeys through and in Texas have been among the worst, and there's something about the insecure bragging many Texans seem to have to do that sticks in my craw, and we won't even mention the metropolitan abortion that is Houston but still . . . so many damn fine singer songwriters have come out of Texas, from Jerry Jeff Walker on down (I could name about 15 justlikethat) -- you just can't generalize about entire states, eh?