OK, after reading some more responses, I get the idea of this question. I answered before that it depends on what you build, and that's still true. For things like flooring or roofing, it's open for me, I like studs and smooth floors. But for soemthign like a Star Wars ship, I like the stud on the outside, it shows that it's LEGO, I think the studs are LEGO, if you dompletely cover them up, then it's like you are trying to build something besides LEGO.
So with that said, I do like studs on the outside of large objects, tiling is a great technique and when used properly it really looks good, especially when you actually want to represent tile. But for the most part, you have to have SOME studs, or elseyou'll get too far away from the look of LEGO. so Studs it is, with the occasionl tiled floor, or roof.