I will also go with 3... a6.
a6: 6 votes (hermesesus, galdur, XMRpromotions, Hueristic, Taras, Foxpup)
Nf6: 4 votes (Morecoin Freeman, dre1982, actmyname, boolberry)
Bc5: 1 vote (jjacob)
Nd4: 1 vote (languagehasmeaning)
Your move bitcointalk. You have the black pieces
The current position is updated below:
Game 2 (letsplayagame vs bitcointalk):
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4
Sorry it took me longer than normal to respond. Who else is pleasantly surprised with how well bitcoin has done over the past few weeks?