1) Castlevania - I love Super Metroid, it's my favorite in the series by far (still haven't played the GBA games but want to). However, I play through SotN at least every other year and adore it every time. It's possibly my all-time favorite game.
2) Zelda, never had a SMS or even knew anyone who had one - my area was 100% NES. Don't think it would have mattered, I was crazy about the original Zelda as a kid and it still holds a special spot for me.
3) Shinobi - Ninja Gaiden was just waaaay too hard, and I beat the original Mega Man as a kid.
Used to love playing Shinobi in the arcade and later on the C64 I believe. The PS2 Shinobi is also an overlooked gem, tho it's insanely hard as well.
4) I don't know that I've ever played either, so I'll abstain.
5) Chrono Trigger, tho it's a mark of shame that I've never finished either of these games. I've played through at least 3/4's of Chrono Trigger several times but always trailed off at the end without finishing. FF3 (6, 127, whatever
) I've barely started. Didn't catch the FF bug until 7.