I find that I view camelCase as one word and camel_case as two words. The '_' works as a separator not a joiner. Since we can only keep four or five words in ou

I find that I view camelCase as one word and camel_case as two words. The '_' works as a separator not a joiner. Since we can only keep four or five words in our working memory it's better for me to use camelCase. It's possible that with more exposure to underscore_case I would eventually start treating it as one word.