There are four main types of cinema audiences: mainstream audiences who prefer familiar genres like comedy and action and avoid foreign films; mainstream plus audiences who are drawn more to a film's nature than its country of origin but mostly watch American films; aficionados audiences who enjoy specialist films with unfamiliar casts but also tend to avoid foreign films; and film avids who appreciate films for their cultural meanings and enjoy various genres. Different age groups tend to prefer different methods of watching films - teenagers prefer streaming online for control options, adults favor DVDs for convenience and repeat viewings, and teenagers and young adults go to cinemas for social experiences and novelty effects like 3D.