Which Mario games are you talking about? And yeah, Nintendo's new lineup looks pretty awesome.
You mean the big eel things in the Great Bay? Those were pretty scary, they creeped me out pretty bad actually. Mainly because I actually have a fear of sorts of murky or dark water, including stuff being in it like those things.
As for MM in general, it's actually my favorite game. I felt it took the best of OoT and improved it in just about every way. I think MM is one of the most polished games in the series, whereas OoT was good and balanced in terms of design, but it wasn't especially impressive in some areas and parts felt lacking or incomplete to me.