I like #2 and #3, really give the feel of soaking up the sun. I think #3 is my favourite with the ochre-coloured tones in the background.
On a technical note, it may pay to jump into the HSL sliders in #1, #2 and #4 and drag the green hues towards yellow. I suspect it would hide a lot of the colour fringing in the background. It'd not that big a deal, just something I noticed.