Most played cards in W/R Humans:

4 Decks
Town Gossipmonger
16 copies - 4 average
Battlefield Forge
16 copies - 4 average
Declaration in Stone
16 copies - 4 average
Needle Spires
16 copies - 4 average
Thraben Inspector
16 copies - 4 average
Reckless Bushwhacker
16 copies - 4 average
Knight of the White Orchid
16 copies - 4 average
Thalia's Lieutenant
16 copies - 4 average
Always Watching
15 copies - 3.75 average
Dragon Hunter
15 copies - 3.75 average
Gryff's Boon
14 copies - 3.5 average
Kytheon, Hero of Akros
12 copies - 3 average
Anointer of Champions
10 copies - 2.5 average
Expedition Envoy
10 copies - 2.5 average
Stasis Snare
8 copies - 2 average
Hanweir Militia Captain
8 copies - 2 average
Gideon, Ally of Zendikar
6 copies - 1.5 average
Repel the Abominable
6 copies - 1.5 average
Silkwrap
4 copies - 1 average
Collective Effort
2 copies - 0.5 average