I have the Subway Ceramics Avalon / Minas with a medium gray grout. And a Shaw's white sink, if anyone is considering that, by the way. (My contractor could have ordered it directly, but at his request, I went through a tile store, and by the time everyone had put their sugar onto it, it was OBSCENELY expensive.) I'm not an installation expert, but at least with the Subway Ceramics, the installers use little plastic spacers between the tiles (I think some others have their own spacers?) when they put them up, they don't do it freehand, so how much grout you get is a function of 1) the limits set by the curvature of the tile and 2) what size spacers they use. So you might be willing to go a little darker with a smaller grout line, or with a handmade tile that refuses to go close together, you might want to stay light. The traditional color is close to concrete. But most modern people don't seem to like that, so do what pleases you!

kegrant- I too would love to see photos and do post on what you finally decide. I too have simply white cabinets (ikea lidingo) and soapstone counters and am leaning towards white subways with white or possibly silvery gray grout (DH's preference) but everyone who looks at my kitchen says you want to add more white?!?! I am pretty confident I will love the look, but photos are always better. Best of luck to you in your search!

kats737, we just got our own set of lovely old-house surprises...turns out every renovation the prior owners made was made in the shoddiest way possible. Big holes cut into major beams...An entire 3rd floor shower held up by a few unconnected pieces of plywood and a whole bunch of plaster...Kitchen floor laminate put directly on rotted floor...we've basically had to gut 3/4 of the place. It's gonna be amazing when we're done, but I'm really not loving the prior owners at the moment. Or our home inspector! Mizlizzie, your bathroom is beautiful, thanks for posting! I'm going to go ahead with my creamy tiles and stop worrying about this one.

your counters are warm. split the difference and get a shade of khaki. No gray grout.