I have to prepare my slides in latex. A quick search came up with different packages. Before start preparing, I need your experiences. I do not want to regret after learning one as I did, learning vim (now can not quit) instead of emacs.
After asking this question at that time, I start learning Beamer. Now I'm really happy with that, I created my own template and now it's easier just copying from my .tex files to beamer template. I recommend beamer for powerpoint users who are actively using latex .