Should we prefer singular or plural in tags?

Question

My experience with English.SE has led me to favor the plural, as the community there opted to use it (see the relevant meta.english post here). However, I thought I'd pose the question to the community. I've already remapped tags from bishop to bishops, as well as the rest of the chess pieces, but before going further, I decided to post here.

Vote on the answers below to state your choice.

Answer 1

Plural

Vote this choice up if you want tags referring to countable objects to be generally in the plural (pawns, openings, sacrifices)

Vote it down if you are strongly opposed to the above.

Answer 2

Singular

Vote this choice up if you want tags referring to countable objects to be generally in the singular (pawn, opening, sacrifice)

Vote it down if you are strongly opposed to the above.