Is Corpus Christi Fun?

I am trying to plan a trip for the end of this summer and I am thinking about either San Diego or Corpus Christi. I have been to San Diego a number of time, and I love it, but I would really love to see somewhere new. Problem is, I have heard that Corpus is dirty, ghetto, and ugly. I really love beaches with big tall waves and lots of seashells to collect. San Diego is great, but I really love seeing new places. Also, I have a friend living in San Antonio who wants me to visit some time. So, is Corpus worth the time and money, or am I better off going with tried and true?