His interests are described as having a penchant for spinning out unbelievably ill jams with his turntables and mixing gear. He has passion to talk about bands that no one has ever heard of but him. He also has a more bizarre hobby of collecting weird dead things preserved in various ways. He also is an amateur photographer, and has his own makeshift darkroom, and operates a number of ironically humorous blogs, websites and social networking profiles, including a webcomic called SWEET BRO AND HELLA JEFF. At any moment he'll drop some phat rhymes on a mofo and obviously represent. When away from his desktop computer, he communicates using his PHONE.
He also has a BROTHER (who owns a collection of totally badass puppets) that he doesn't seem to want to bother due to some sort of friendly sibling rivalry. He does not seem to carry the same feelings of angst toward his brother as JOHN and ROSE carry towards their parental figures -- rather, he regards his brother with respect, even emulating him by picking up his interests and wearing his shades. At first, he did not seem at all perturbed by his brother's habit of collecting puppets and, in fact, seemed to admire his brother's ventriloquist rap acts. However, he's mentioned to Rose that the puppets are starting to freak him out and that he's had dreams where LIL CAL speaks to him, causing him to wake up in a cold sweat. This likely has to do with Cal's presence in Dave's DREAM TOWER.
He seems to know a lot about CAPTCHALOGUING and Fetch Modi. His current Fetch Modus is Hash Map, a more advanced version of John's. He helped John with his STRIFE Specibus and Kind Abstratus. Despite this, Dave is prone to making occasional mistakes with his Modus, such as spilling apple juice on his turntables, firing his ninja sword at a RAMBUNCTIOUS CROW, and shooting many deadly shuriken at himself.