Fort Worth here.
I rode FM 4 south from 180 (west of Mineral Wells) today. The part between 180 and I-20 is THE BEST RIDE around North Texas. It's a winding, downhill, country road. Go slow the first time. When you get down to Santo, turn around and ride it again, uphill.
FM 4 southbound is one of the better rides in these parts. Southbound you will go thru Granbury and the old town square. With a little bit of zig-zagging as you come out of Granbury, it will take you into Cleburne. More zig-zagging thru Cleburn, it heads to Grandview. Pick up 916 heading east, under I-35 over to Maypearl. This section is a really nice winding country road. Take 157north up to Mansfield and then back into the Metroplex on 287.
Most of my impromptu Sunday morning rides are on some section of this route.
Soon I'll have to ride FM north of 180. I've heard good things ...