Have you heard of Crystal?In short, it's a web app that attempts to analyze and summarize your personality through your web presence. Its main objective is to help improve communication — you can look up anyone you wish and their Crystal profile will tell you how best to communicate with them.Some have found the service "eerily accurate," while others find it problematic.Intrigued, I requested an invite and was granted access a couple of days later.I felt weird creeping on anyone I know — even J — so I decided to try the algorithm on myself.I wouldn't say that my Crystal profile is "eerily accurate." (But then again, it's only 40% confident that its analysis of me is correct.) For example, I practically...