That has happened to me a several times...not only with bags but with lots of things I own. I have come to realize that I am the type who needs to live with something for a little while and then I know if it's me or not. For example, I knew Mr Rocker for 7 years before I dated him, 4 years before I got engaged, and 3 years before I finally married him!
I have lusted after many Hermes bags (scarves, bracelets, etc), finally get them and then find that they are just not me for some reason --either the skin, color or style is wrong. I used to beat myself up about it but now I am just resigend to knowing it is part of my strange personality. Oh well!