I've not used any corrugated material other than what is available from Campbell. Self sticky stuff sounds cool but I'm not sure what to do with it in a situation of a loafing shed where both sides might be visible.
Regarding securing on highs or lows......... In the west were some locations have very high snow packs.... there is a lot of thawing that goes on underneath the snow. The water is often trapped there for extended periods of time. Screws in the lows would put them in the standing water and a nearly guaranteed leak to the inside.
Much of the sheet steel materials available now are not so much the traditional corrugated materials but rather rolled steel where the raised areas are nearly square in profile and spaced 6 - 8 or 10 inches apart. There are a lot of profiles and colors available. Here is a click location that shows easily one such profile option.http://www.michianabuildingsupplies.com/index.htm
There are tons of options and I'm sure there are a lot of regional requirements that would beg this or that modification. We have in the mountains of Idaho roofs that are engineered for 12 to 15 foot snow loads. We don't get anything like that in Boise but the surrounding areas must take this in consideration.
For me... I model 1897 to 1914 so it is corrugated sheet iron. Amazingly enough........ there are still structures out here with that stuff that is still servicable. Our climate is so dry..........summer humidities are around 15 to 20%.......... that this stuff survives long after a wetter climate would have disolved most anything.
Electricity...... damn useful stuff ! ! ! !