Agree that too many elements of the same look can look a bit OTT and cross the line into "young frump".
Also it feels a bit inauthentic like I'm not really putting anything of myself or my personal tastes in there?
(like sometimes you get young men wearing the "pastel polo shirt with animal logo and/or stripes on it + chinos +pricey watch" look even though it doesn't suit them, because they have gone into a profession or industry which they feel needs a "posh uniform"?
So they just go out and buy some stuff because thats what they think they "ought" to wear, with no nod to their own personality or self.
Very weird, and sad.).
yesterday I got two Ness jumpers from a charity shop (£11 for both) which I'm planning on wearing over a plain white shirt, they have quite a bright colour print.
Trying on today, I definitely will need black skinnies or leggings to balance out the bottom half for a sleek element, otherwise I look a bit staid and matronly.
I'm hourglass - size eight but I need to keep some stuff fitted or I look a lot bigger.
Also (I love love love this) - went to TKMax and got a plain boatneck cotton top in plum colour which is very comfy and looks great on me over jeans and as a lounging around top.
I think that means I can throw out four casual tops I don't "love" now 
Originally from Crew clothing, they have some nice other stuff though not the exact one I got (maybe its an autumn line?)