I think the first texture you were using looked best, it was the most realistic, which I can relate to. The last one you posted doesn't resemble any landscape that I know of, and therefore is not as pleasing to me.
Compare it to going to a concert to listen to an artist you never heard before. It definately wont be as nice as listening to an artist you know and love.
Now making textures is difficult, but an important part is having fine details. "What the f*** is he talking about?" Okay, here's an example:
http://www.accustudio.com/exchange/text ... rass-3.jpg (suck)
http://www.mayang.com/textures/perl/pre ... 091054.JPG (good)
So you see random patterns are only aesthetically pleasing when combined with some sort of base texture. In your case, the current texture could use a 50/50 or so Hard light blend with a decent grass texture, to add complexity to it.
I can highly recommend mayang if you are searching for good high-res textures to use in your work. Unfortunately the page only allows you to download 20 textures per day(presumably to keep bandwidth usage down) so don't be too hasty when clicking the thumbs or you'll have to wait it out.
Hope I didn't bore you too much with this long post, suffice to say surf
here and fiddle with Photoshop until you get it perfect. Else people are going to bitch and you'll ruin a perfectly good map concept with a poor texturing job.