Back on topic...!
In my free time (of which there has been very little for the past several weeks), I have been booting up the old Castlevania games on various emulators, and attempting to finish them in legit play throughs (no save states, no frame slowdown, or other various emulator benefits). Thus far I managed to finish Castlevania Dracula X: Rondo of Blood, an amazing game for the PC Engine (TurboGraphix16) that was, sadly, never released outside of Japan (probably the best 'linear-style' Castlevania), and Super Castlevania 4 for the SNES. Both were quite challenging, but certainly doable.
At present, I'm trying to beat the original Castlevania and Castlevania 3 (both for the NES). Each of these games is far harder than the two I mentioned above, with CV3 being, arguably, the hardest in the series. As for the original Castlevania, I am stuck on Stage 5 and the Death boss battle, and in Castlevania 3 I've not even reached the point where you enter the castle yet (stuck on the stage before it). Quite challenging, heh heh!