I'm the same way with my collection. My OCD also curses when logos/thematic changes happen at a publisher for long standing series, such as Excel Saga where the Viz logo design changed.
This might be just me since I am actually thinking of re-buying Yotsuba&! 1 - 5 just so I can have all the spines match up since Yen Press took it over.
And since we're posting pictures of our collections :)