Readability is a very worthy objective. And alignment has been used since before Gutenberg in text layout. Almost all code uses vertical alignment to some degree, whether its indentation, aligning braces or what have you. Aligning variable assignments in a grid is a natural extension particularly where those variables are interdependent (ie. changing one value is likely to require altering another in tandem) or where the variables are part of a formula where quick scanning of the values aids comprehension.

So it has its uses. Personally, I use it where it makes sense, organizing blocks of related variables together, and changing the alignment occasionally as needed to accommodate longer variable names. It's not OCD at all, and I for one find that developers who care about how their code looks end up producing better, more successful projects. Well laid out and highly readable code is, to me at least, one of the hallmarks of a truly skilled programmer.