I think the first one is great! Very well framed in my opinion. Did you try that one with a greater depth of field by any chance? Not necessarily saying it would be better, just wondering what it might look like.
the last three seem very dull, possibly more contrast? Honestly not liking these 3 shots though.
@Wiggz: I did actually, yes. Beyond that (I'm pretty sure it was around f/4 or so), it began looking mushy, rather than like grass. Also, The 3rd last one was my first attempt at motion-blur, so I think I got a bit excited, haha. And as for the flowers, I was actually going for the sort of deathly, dull-ish sort of feel. In colour it was also nice though...
@desertdave: Thanks! Anything I could improve on the others?