try to maybe spice the roof up by these tips:
1) try to NOT use all one material bland roof.
2) Try using stairs for a more curved roof and blocks for a thick nordic looking roof.
3) Add details such as a tower or chimney.
4) if you wanna go far with a roof use cobble/ wood for the outline then another material for the inner part
5) little lookouts or peeks out lol thats what i call them
pictures below for examples.
Srry for crappy house kinda rushed a little
EDIT: also this is depending on user pref. but you can always add dragon heads and stuff like that on the end orf your roof. hope all this helps
Here is a better house lol I did not like the other one that other house is not my good work.
It shows what I said before ^^^