Please excuse any ignorance on my part, cause I’m fairly new to the study of typography and new to Typophile.

Only a year ago I started purchasing commercial fonts - to augment the usual collection available bundled with programs or shareware/freeware. Now I’m hooked...but I don’t have much $ to invest in fonts and don’t have many clients yet, so I have to restrain myself!

I was recently seeking a heavy, clean-looking, modern italic sans, and found Leitura Sans http://www.myfonts.com/fonts/dstype/leitura-sans/italic-4/ on MyFonts - that worked well for my purpose. All the DS fonts were half-price that month, so I helped myself to some of the Leitura Roman text fonts too.

Now I don’t like Leitura Roman text font at all, and asked myself why I bought it!http://www.myfonts.com/fonts/dstype/leitura/ The PDF advert was so beautifully designed it deceived me...

Mostly, I detest the lower case “g” - it has little flag sticking up on the upper right like a cowlick. Rather than gracefully leading the eye to the next letter, it sticks out most unpleasantly. I can’t seem to get past that. Did you ever decide not to use a font because of a single letter?

Last week a page on this site pointed me to a modern text font bundled with Powerpoint that I like better - Cambria.

I know that someone is likely to tell me that Cambria sucks or is already becoming overused, but my question is this:
Have you ever made a misjudgement choosing type? and why?