the name of the page is really for you to know what the layout of that page is. full.php is probably the best way to go for a page with no sidebar but you could name the page 'trixiemayspecialty.php' and it wouldn't really matter. C5 will interpret the page by how it's coded not by it's name. But, if you were thinking about adding your theme to the C5 market place then it would probably be better to stick with simple and straight-forward names. For instance, I've created a theme that had these page types:
left_sidebar , right_sidebar , full , default, three_column. This is nice because it is pretty self explanatory as to what each page type is and what it will generally look like when loaded.