Has anyone been successful?
I have tried 3-4 time and never get listed?...
Getting added to DMOZ is at the discretion of the editorial team. I got my wife's photography website listed www.LarissaPhotography.com , but I haven't submitted my own website yet. I guess I need to give that a try soon.
Have you made sure that you have quality content on your website before submitting?
I think the best thing to do with DMOZ is submit and don't worry about it. Multiple submits of the same site will more than likely get you blacklisted as is the case with most directories.
It can potentially take a year to be listed in DMOZ, if you ever are. Follow the guidelines word for word, submit, and then don't worry about it.
Remember, although DMOZ has traditionally held great value with search engines, it is only one site on the web.