Intriguing selections in this poll. I really didn't like Dracula X (RFN is to blame for my regretful "I'll give it a chance" purchase, actually). I recall Zombies Ate My Neighbors as being a fairly flimsy game, but I probably didn't give it a fair chance back in the day. Pulseman and Star Tropics 2 are both flawed but enjoyable games--perfect for RetroActive.
That said, I voted for Ys I & II. I've never played any games in the series and have been meaning to get around to this release on VC. Of course, since I voted for it, there's no way it will win now :)