Check who owns the Directory Check to see how long it has been online Check the categories Check the marketing Check the feedback Check the credibility Check the Review ROI value etc etc many many factors need to be assessed
I check whether it's family-friendly first of all. I also look at the other websites I could be listed alongside: are they spammy and MFA, or actually quality resources? I also look for signs that a directory is cared for. Are there typos, and is the design unique and tasteful, or just a clone of many other directories?
price is number quality template style what script they are running traffic reputation approval time Page rank or backlinks
I will check the price, whether it is well-promoted and is advertised well, PR and also the script plays a factor. A custom template is also important to me as it reflects on the seriousness of the directory owner in this business.