tile bathroom question-

#1. if they don't fit, trim the bullnose ones so that the grout lines line up.

My vote would be to do it the way it looks in the orange graphic design that is in the link you provided -- which essentially means do it like option "2" that you presented. Personally, I think it looks better to not have the grout lines for the bullnose line up with the regular wall tile grout lines.

Having everything line up is kind of boring, no? Shows a lack of imagination in some ways. Bullnose is not the tile field and there's no reason to try to make it part of the tile field unless there's a whole grid theme going on. That in itself would be a problem as the room can all too easily start to feel cage-like or institutional.

When making such tile decisions it helps to mock up a section and see how it looks. Doing it on the floor is fine - you don't have to tape tile to the wall.

Do you want them to look like a continuation of the field or a border. Personally, I vote for the latter (#2, orange).