Well, you won't find me playing the next 3d game unless they change a lot of things. I tried the first of them (with Leon Belmont), and it was just barely passable. Didn't get around to playing the 2nd...was it better or worse?
Still, the 2d Castlevanias (along with Super Metroid) are probably my favorite style of game to play.
Try really hard to finish the training room NOW -- the power you get will blow your mind. Everything can be done with just magnet and double jump (though super speed can help in a few jumps). It's not that bad anyway...there's one spot that seemed impossible to me, but if you double jump you can do it. One piece of advice below for that area in white text for you.
Bad ASCII art time!
_____xxxxxx| o
o
It's like, room 4 maybe? Anyway, o is a magnet attach point, and x's are spikes. Shoot out straight right and jump up at the end while holding down the magnet button -- you'll just barely catch onto it.