I think the Commander is right - the minis look somewhat 'toyish', which probably comes from a too heavy/thick basecoat. Or a bad primer. Details seem drowned in paint.
Now, these are metal models, and some of them very nice ones, so I understand that jp wants them to 'look the part'. For that, thin your paints, use at least four layers for skin (deep shades between fingers and the likes, shade, base colour, and final highlights for knuckles and brows and the likes - anyway always make sure that your final highlight has enough contrast to the previous layer
For speedpainting a substantial horde, I would recommend going for blocking out the colours, giving the entire mini a shading wash - maybe followed by various coloured washes for variation (as said above), and then drybrush on a 'highlight' of the original blocked out colours (works best for speed when batch-painting).
But try different techniques and see what suits you best