Its usually shouen manga sometimes abit of shoujo, but its not really what type of manga, its the PSP auto-focus when it loads picture files, if the pictures ain't formatted for the exact size of the screen, you have to zoom, so everytime you load up a picture, it does this weird focusing thing that last about 2 seconds.
now if you flip though 50 pages, the annoying in/out fuzzy to focus thing really messes withg my vision and makes me nauseous.
I can get round this if i format the pictures properly, but thats a pain in the arse, and plus if i format them i can't zoom in and see the details.
so it's either no picture quality zoom ups, for portability, or read 'em on my wii.