I voted for Mega Man 3 based on the discussions in this topic. I've never played either.
My MM game back then was Mega Man X. I remember my mom asking me if it was an adult game (I presume because of the X in the title. I was 13 at the time).

She was so good about stuff like that (though it rarely came up since, for the most part, I wasn't into very violent games anyway). Ah, gaming in the 8/16-bit era.
Off-topic question/musing: Will Jon ever host another episode of RFN? Hasn't NWR Chat been dormant long enough?