What To Collect

Backward collecting. :) I have a stupid question. I have a Stanley Gibbons Nubian Album. What a neat album. Black pages with a white grid. I am trying to decide what I want to put in this album. My main collecting interests are France, Russian Empire and Great Britain. The problem is that I like Albums and have nice French albums, Stanley Gibbons New Imperial and George VI, and Frank Godden albums for the Russian material. So my question is what would look good and be fun to collect for this album. What are your suggestions. I don't want something too complicated or very expensive. Thanks for your help.

I will put the special stamps that don't fit in my albums