oooo this is really difficult to decide.
The manga itself is great, it's continues the storyline regardless of anything and it's got great concept art. Plus u're the first to one wut the characters are like. And then they give out like awesome characters and they give like great inspiration for character designs and storyline as well. However, when reading the manga during the action/fight scenes, the characters move so fast that you dont know wut jus happened and u have to read tht particularly page over n over till u get it.
The anime is great coz they bring the characters to alive. Due to the colour used in the anime, it provides great material for sigs and AMVs and other stuff. Plus they bring those awesome battles in the manga into something u're blown away by i.e the Naruto vs Sasuke and Ichigo vs. Byakuya. But on the other hand, if the manga series is not finish then, the producers tend to broadcast annoying fillers.
I'm gonna with the manga coz it keep the storyline going and the inspiration it can give.