We conducted user studies in 2000 and 2004 into digital media use, and discovered a number of constant findings even though the studies were separate both in geographically and chronologically. These constant findings, which we call design drivers, represent high level user benefits and constraints which are not likely to change quickly. We feel that knowledge of these constant drivers is beneficial in designing key features of mobile media devices. On the other hand, findings specific to a particular environment, variable design drivers, help to identify potential enablers and obstacles of product adoption. Keywords User research, user centered design, mobile media, digital media consumption, mobile context ACM Classification Keywords