Each one has it's own good points. I prefer manga because it is usually more detailed and i also like being able to see the art style of the authors. But as another person said i'm also lazy so i also like to watch the anime.

i very much like both. yeah the manga's have better detail in them i know, but there is nothing like seeing your favorite character moving about before you

i prefer manga over anime. i remember a long time ago it use to be the other way around because nothing beats move colored pictures with those cool effects and sounds but then i stared to get displeased with how some characters sounded in the anime cause they'd seem to have a diff voice in the manga depending on their nature. also, anime tends to speed things up and cuts out a lot of good details to get to the point. i love details and extra info on my fav characters so the anime wasn't doing me any favors in that part.
last but not least, i don't like how the anime's story line runs off track compared to the manga because then the endding turns out to be crappy. i hate crappy endding. "mcangry" so, manga is better.

I like both, but sometimes I prefer manga, beacuse the anime can be different.

I like manga more because it's usually more interested than anime.

I like both of them but it's faster to read a manga and you can also read it any where. With anime you need a computer or a tv.

I like the animes. Its a lot easier for me to follow the storyline, and I can multitask.

Manga because I'm impatient and like to be able to read as fast as I want to.

Usually If there are both versions of the same story, but one of them is an original work and the other an adaption, the original is better than the adption.
Generally I prefer maga versions of stories over the anime versions, as I'm not much of a movie/series person, but there are of course exceptions.