i think i put 1 vote for each side since you use both.
POLL: Do you like to use MCO'S or online Data bases?

But, you should modify your poll. Make it more general: do you use printed, online, or computer databases?
MCO pales in comparison to NCO, FCO, and the granddaddy, ECO.
Chess.com's Game Exlporer pales in comparison to other online databases. NIC has approximately the same small number of games, but has far better quality.
I'm curious how you counted my vote, which was neither in terms of the narrow scope of your question, and both if your question was broadened to include ECO vs. ChessBase databases.