Most played cards in RUG Aggro:

4 Decks
Mishra's Factory
16 copies - 4 average
Psionic Blast
16 copies - 4 average
Taiga
16 copies - 4 average
Volcanic Island
16 copies - 4 average
Black Vise
16 copies - 4 average
Lightning Bolt
16 copies - 4 average
Tropical Island
16 copies - 4 average
Scryb Sprites
16 copies - 4 average
Serendib Efreet
16 copies - 4 average
Kird Ape
16 copies - 4 average
Argothian Pixies
15 copies - 3.75 average
Counterspell
15 copies - 3.75 average
City of Brass
15 copies - 3.75 average
Chain Lightning
14 copies - 3.5 average
Shatter
13 copies - 3.25 average
Blue Elemental Blast
12 copies - 3 average
Control Magic
11 copies - 2.75 average
Artifact Blast
8 copies - 2 average
Giant Growth
4 copies - 1 average
Strip Mine
4 copies - 1 average