Against 1.d4... d5 or Nf6 or f5 ?
How's about b6!
Why 1...b6? (",)
Try all and see what you like the best, I like to play d5
I like them all, you can win and lose with all of those
b6, e6, g6, c5 etc. are no worse than the options you listed.
d5 now, sometimes Nf6, depends on the humor & the adversaire, yo!
F5 All day mate...
Against 1.d4... d5 or Nf6 or f5 ?