Which 1v1 maps are the fairest - and why?

[swimj]

Sharkfood-things swing so quickly that "committing to defense" does not limit your offensive capability. Yes, it is inclined towards "turtling" as Syvan describes but in terms of fairness that's out of the question. If you're really opposed to turtling, you can force your opponent into a bit more of a freewheeling game by sending over a couple early runners/soldiers without seriously endangering your defense.