1. Anybody here know the anime/manga known as YuYuHakusho?

No more than what you've told me ^_^

2. This one is completely unrelated to Q #1.  Who is your favorite side
character?  Why? It can be from any anime/manga series.

Hmm, let's see.. favorite side character? Kodachi. DEFINITELY Kodachi.. I
think Kodachi is a goddess.. *hides from all of the insane ppl who don't
like Kodachi..* ^_^

3. Which anime/manga character do you hate the most?  Why?

Hate? Gee, hate.. Hate...hate.... Errrmmm.... *blink* what a question. Okee.
Got it! Ataru's *mother* .. "I SHOULD NEVER HAVE HAD HIM!!!" *wince*.. ite..