Hoping some of you with more experience can shed some light on this dilemma. The 55 and 56 Salsa Vayas both fit me, in different ways. The 55 is more like a glove and I feel more agile. The 56 allows me to stretch out more - the handlebar is too wide, but that can be addressed. Like going from a VW Golf to a SUV. The 55 was uncomfortable without an additional spacer in the head tube - before the spacer, it felt like I was bearing down too much on the bars. On the 56, I am back a bit more and when I look at pictures, weight looks unbalanced - like all my weight is in the back and I am just holding onto the bars for the ride. It doesn't feel that extreme, but that is kind of how it feels. I do feel like I can control the bike, just not as tightly.
My question is, for riding all day (mostly greenways and trails), is it better to go with a smaller size or a bigger size? I'm not sure what either feels like after a long period of riding, and as I become more accustomed to drop bars. I'm 5'9 - just a hair under 5'10 really and my PBH inseam is about 34, if I recall correctly.