Hi Copperchange.
The good news is that the figures are neat and tidy - colours are in the right place, and that\'s a good start. I think the best bit of advice I can say is read and devore as much painting information as you possibly can. There are loads of great articles on CMON, and elsewhere.
On a practical level, what you need to do is get some depth to your figures with some shading and highlighting. If you haven\'t got them already, I absolutely recommend the GW washes - they can make even the blandest of colours show nice depth and richness. It also gives you visual clues on where to lighten figures by simply automatically deepening the recesses.
Highlighting\'s a slightly more difficult beast, and all I can say is it comes with practise! Obviously, it\'s not just a case of bunging in more white into a base colour to get a lighter shade (although it does work for certain shades!) - that would be far too easy. For your greens, I\'d say experiment with mixing in yellows and fleshy tones to get a lighter colour and see where that gets you. For the flesh, it\'s slightly more difficult to explain - you can add blues, yellows, browns, purples and all manner of shades to get convincingly realistic flesh. I\'m still very much learning how to paint flesh well myself, so I\'m sure others could help further.
The final bit of advice is purely personal, but it was absolutely invaluable when I first started out - it\'s always worth learning about drybrushing. It is a bit of an antiquated technique these days, but it does train you to see where natural highlights should be on a figure, and it does give you instant highlights which look perfectly acceptable when you start to paint. However, there are loads of folk who hate the technique with a passion, so it\'s always worth getting the other side of the argument and see what you might prefer.
Just carry on with it - if you see improvements (even tiny ones) in each figure you do, then that\'s got to be a good thing! Good luck, and happy painting!
