I'm not completely sure which one I prefer. I did write a whole bunch of stuff about relating to characters and stuff, but I didn't agree with myself wholeheartedly, so I'm only posting this.
The majority of multi-anime vids keep your attention and always feel like new scenes are showing up, since it's mostly different animes, but you can't really relate to the characters, since there are so many. Single anime vids allow you to get to know the character more thoroughly, but many less well done vids lose your attention with only one anime.
But all of this is only the majority!!! There are a lot of vids that disagree with what I just wrote. Ex: Memories Dance was a good vid that made me become attached to the characters. Ex: Eva Potential never seemed to lose it's fresh look for me.
So, I don't know where to stand on the subject.
Hey Vlad. I thought your The Look was another good example of a well done multi-anime music video. Also, your Kung Fu Fighting one is awesome! Then again, almost all your vids are great (I would say all, but not all of them are for download, so I've never seen them

).