I am absolutely in love with the first generation of skins (which means the first 2 seasons) and even though the 2nd generation is almost as amazing the series slowly starts lacking story-line and character development. You know, I would've loved to give this series 5 stars, but sadly the level of quality drops with every generation. Don't even get me started on the 3rd generation. Seriously. It doesn't add up in so many different ways and is simply not good.
I recommend you to watch the 1st and 2nd generation and simply give the 3rd one a pass, it's not worth your while, believe me.
This show is for everyone that likes a bit of gore but still wants an interesting and 'deep' plot and story line.
I find it sad however that you don't see Sam and Dean fooling around anymore, you don't see them smile very often, which I find quite sad.
The first seasons of Supernatural were stale cigarette smoke, one-lane highways, weeping guitars and faded leather. Supernatural was grief and daddy issues but it was longing and hope.
Whilst now it's often mostly grief, and self-pity, and pain.