Without facts based upon research you’ll end up with a lot of opinions.
“Truly understanding the feelings of our users has always been the dream of user experience researchers. Are they enjoying themselves? Are they frustrated? Are they genuinely interested and engaged? Understanding how a user truly feels in reaction to an experience can help us to optimize specific aspects of the experience to exude certain expressive states. We are entering a new age of insight that probes at the core of our users’ experience: studying their emotions.”