It's interesting to see customer service on so many of your posts. I look for quality/workmanship and practicality/design. Quality and workmanship is most important to me. If I'm going to pay high end I want it to last.
I'm going to go out on a limb here:
1) Customer Service
Yes, with most bags this will never come into play. If the bag is well made you likely won't even KNOW if the company has good customer service. But when you have a problem, no matter how good the bag looks, if the company (or merchant) is unethical or gives you the runaround, you will feel so frustrated and disgusted, both with them and yourself for ever buying the bag in the first place that it is the only thing that will matter. Not only will you not purchase that brand again, your negative feelings will make you want to get rid of all the bags you own of this brand.
2) Quality
Gorgeous leather and impeccable workmanship are a thing of beauty you will appreciate everyday
3) Design
I tend to go with classic designs that will last a long time so I guess I'm not as style conscious.
ITA If I don't like the design then the rest doesn't matter. Secondly it has to be practical for my lifestyle. I won't buy a bag that can't be worn on the shoulder and it has to hold everything that I carry on a daily basis. After that I look at the quality, some leather and workmanship is just better than others even among top rated designers. Customer service plays a minor role for me. I have never had an issue with a bag but in the purchasing of the bag if I had a great SA I am going to feel more postively about my purchase and will be more likely to buy again. If I have a negative experience I most likely will not buy from that store and possibly would chose a differnt brand over the one that I was going to buy.mine is
1. design
2. practicality
3. quality
4. customer service
most high end brands have great quality so i'm not so concerned with that... design is my deciding factor, then practicality. no point in spending so much money if i'm not going to use it! quality doesn't even matter in that case.