I actually like M&S and I feel like it has been made a scapegoat here. There was frilly dress that everyone laughed at - frills are still in fashion and very similar dress is on ASOS. Embroidery on t-shirts is very Gucci. I feel that M&S makes trends approachable and there is still good choice of basics. I'm sick of hearing how M&S should be like Cos or Hush - all to their own, but for me they are incredibly boring, boxy and grey (and expensive). I'm 37 - I'm not totally quirky and into trends, but I'm also not into oversized shapeless clothes, just because they are supposed to look 'posh'. M&S is starting to fill that gap for me. Their skinny jeans are great - i have got three pairs. This January I bought a dress, 4 blouses and some nice underwear 
The other thing that I do not get here are the complaints about fabrics, love for natural fabrics, cashmere etc. and after all that talk, someone says how fantastic Sainsbury's clothes are and everyone cheers. Yes they are decent, but you won't find cashmere there
And the last thing: a few ladies were complaining that almost all M&S dresses have got some sort of sleeve - I remember the days when Mumsnet begged M&S to introduce more sleeves. 
Rant over 
I preferred last season collection but I'm eying up some things that are in stores now:
simple black dress
denim dress
sort of denim dress
lace dress
long shirt
flowery shirt
cotton shirt
flowery blouse with statement sleeves