It is an interesting question, I have thought on this many times. But there is no a definite answer, I think.

Following the "cultural" conventions it a good choice. "Cultural" in this case means conventions set up in the team/company and they basically carry the language/platform conventions as well. It helps others to read/use your code easily and doesn't require additional efforts and time to get into the way of understanding your code.

Sometimes it is interesting to break accepted notations. One of my small projects (on Python) I used underscored_names for utility functions/"protected" methods, and Java-style methodNames for methods. My team was happy with it :)