Which one do u play e4 or d4 and why?
I'm a 1.Nf3 player ... but I suppose the structures I transpose to are usually d4 openings.
I probably do this because I enjoy small centers (e3+d3) or staggered centers (e3+d4 / d3+e4) ... but I don't enjoy playing with large centers (e4+d4).
I don't enjoy large centers because it gives Black a clear counter-attack (chip away at White's center), and I'd rather Black work harder to figure out a plan.