Really glad this hasn't turned into a cammo bashing thread as it usually would..
I find it a very interesting subject myself.
IMO Flecktarn is one of the best, and really comes into it's own in autumn. I would love to get some clothing the same colour as my dog as he just vanishes in the autumn/winter leaf litter- a kind of rabbity-deery colour. Odd that...
Desert cammo patterns work really well in the yellow grass of open moorlands:
One of my favourite patterns is the late WW2 pattern seen on my '44 SAS smock:
It is great around town as it looks like fashion cammo, but is still windproof and damned tough! Great cammo pattern too...
Swedish is another large block cammo which looks great and not too 'cammo-ey' but better suited to a green environment.
Most of the time though I wear an OG ventile suit. I recently bought some US BDUs in Sherriff Brown but it is quite a dark choccy brown. I'm hoping with washing it will fade to a nice light walnut as this I think is a great colour for autumn woods without looking like a nutter. Not that I really care about that...
Re Multicam. I have a good set of original Crye in the ACU pattern and I think it is ace for mediterranean regions like Spain, but not much cop over in the UK. Recently on my Hungary trip a couple of guys wore it on a night creep and it practically glowed in the dark.. Not impressed.. The rest of us wore DPM and it was perfect in the wet mountain forest. One dude wore Hungarian Para Cammo (which I have a set also) and it is simply THE best woodland autumn/winter cammo there is, and a tough, hardwearing good design too. Sadly, due to joining NATO they have had to ditch it and adopt a more greener pattern to fit NATO colours- something not popular with the old hands..
Hungarian Para cammo on a Hungarian Para on the left: