Only reason i decide to read manga... is if I'm too inhesitant to see how an anime will play out lol,actually lately I've quite enjoyed reading manga outside the anime realm :D .
All of my ratings on my Anime List are "Enjoyment" ratings, so don't read too much into them for anime quality etc.
Just like good books or movies, I tend to watch anime series I enjoy multiple times. For instance, I'm pretty sure I've seen kaze no stigma about 7x now and Vampire Knight/VK Guilty close to the same just because I can't find anything new to watch XD
I don't like being forced to wait until the next week to see another episode of an anime, so i tend to wait until the series is over and watch it all in one sitting :D, though I doubt I'm alone in this.
Also, if anyone needs a place to watch anime, go to http://www.otaku-streamers.com It's by far the best anime streaming site on the internet with thousands of anime and jdrama titles and 100% free with no ads :D.