with b3 you essentially hand over the pawn structure to black as he can do a million things with his central pawns. if your strategic arsenal is wide enough this is not a problem but still difficult. with 1 e4 you at least have some say on what structure you can get.
I have been been playing the nimzo-larsen attack for quite some time. Usually through the move order 1.Nf3 2.b3, though I can play 1. b3 as well.
My teacher has recommended that I play with openings that help me grow positionally and provides simple positions/plans to master strategic concepts. So, strongly suggested the Giuoco Pianissimo. I have played this before as a child, and I see many respectable players have utilized it.
My heart really misses nimzo-indian though, but my mind feels the Giuoco Pianissimo/bishop's opening may be helpful...I still use the nimzo/larsen with success in blitz matches online. I am about to start delving deeper into the Giuoco Pianissimo.
Has anyone ever been torn between two openings? Any comments about either opening? I would like to start playing OTB tournaments again, so I need focus my study.