Elly, I can totally relate to your #3 (refusing to buy/shop/spend on stuff that may not work). Thank you so much for sharing!

For me, the fear is mostly about fit. In the past year, I've gotten a lot choosier about fit. Initially, I donated many of the items that didn't fit me, but when I literally got down to a dozen tops, my wardrobe options got super-duper limited. I have more tops now, but it's really hard to "let" myself buy tops because I'm afraid that I'll get rid of them after only a few wears; somehow, I've convinced myself that I'll magically find some sort of fit issue that I've overlooked in the store.

Is this fear unfounded? Yes. Does it affect my enjoyment when shopping? Also yes. The result is that my wardrobe is still fairly limited and has some pretty big holes.

Buying an item that needs to be altered to fit perfectly... and not getting it altered -_- I have still only gotten jeans hemmed ONCE (and they didn't make both legs the same height *sigh*). Nearly everything needs back darts and waistband darts to fit me correctly. I really should find a good tailor close by ><

I'm currently working on breaking the habit of thinking that I'll suddenly have reasons to wear heels. The reality is that my three pairs of heels (I just sent the 4th pair back to Zappos) have been worn a grand total of 10 times in the past year. The even harsher reality is that one of those pairs is really versatile enough to be my only pair of heels, and I haven't worn either of the other pairs since I bought them.

I also have a tendency to think that I wear necklaces a lot more often than I actually do. Somehow I've gotten into the habit of bringing 10 necklaces for a 5 day trip and then only wearing one of them....

Impulse buys, and quantity over quality.

But I am reforming.

Impulse buys
Procrastinate returning something until after the "grace" period - and then stuck with it
Buying clothes in the store without trying them on
Serious shoe and handbag hoarder

Shopping as self-medication when I need to ameliorate a bad day! (I could have worse habits!)

Purchasing uncomfortable shoes.
Impulse buys.

Impulse buys needn't be a bad shopping habit!

I had to contemplate this for awhile, but I would say my downfall is letting a good bargain influence me too much, and buying multiples of an item I like in different colors.

I have gotten so much better at buying only comfortable shoes (after waisting big bucks on so many I end up not being able to wear). I spend loads more now on shoes, but that's ok, I am loving the style and edge they can bring to my outfits. I am improving in the bargain area too, I have come to realize I would much rather have a few great pieces than a bunch of ok stuff.

But impulsively buying something when you have a nearly-identical item at home, or impulsively "settling" on an unwise/sub-par quality item, definitely is a bad habit... that's what got me into trouble with an over-stuffed wardrobe years ago.

I'm in the mode of taking it cool and calm and not jumping into any splurges. Ofcourse this comes from the opposite and having done these splurges over the past year. I feel like relaxing into my style and having a small warderobe, which I think is a far cry from where I was a year ago, and it feels great.
For the past couple of years I do feel I had bad fashion habits. I was confused and felt I needed to catch up on style. Now I feel more comfortable and relaxed about this process, and that feels great.