Ok not caught up on all the posts so apologies if I'm repeating anything.
For me it's unpolished shoes. I love polishing shoes and spot a scruffy pair a mile of. I'm not saying you need to go for the mirror shine parade gloss look but a quick polish does wonders.
Agree with keeping price tag stickers on soles of heels - looks awful.
Missing or loose buttons is another pet peeve of mine. It takes 2 minutes to break out a needle and thread to fix a button.
I love irregular choice shoes (sticks tongue out at all the haters) but I do have a thing for fugly shoes. I own many fugly shoes including platform trainer monstrosities. It's just a pitty that irregular choice don't fit me so I can't buy them (5 too small and 6 too big
).
I still lean towards alternative/goth clothes so probably don't fit in with some the standard fashion rules. I don't really care though and love the way I dress.
In fact I know of one fashion no no that I do regularly and will make all you super stylish people cringe. Socks with ballet flats. I like how it looks, it stops my heel being rubbed raw but I know it's generally frowned upon by the masses.
My current hates for fashion are the jeans that look like the bottom cuff has been put through a paper shredder - just why?
Also full sports gear for walking around town. Unless you are running around a track / participating in sports you do not need a tracksuit. Ditto running clothes. Yoga gear is slightly different and can be pulled off by the bohemian types but generally looks naff on most people.