I thought the very point of the character Data was that nobody thought much about him?
I mean, Starfleet Academy just sort of let him enroll and graduate. Starfleet then employed him in singularly indistinct jobs, after which he ended up doing menial tasks on Picard's bridge. Only one guy expressed scientific interest in how he was put together, and nobody in turn paid attention to the guy. Also, everybody seemed to think that Noonian Soong was a charlatan, and the androids made by him did not appear to alter that one iota.
...Really, the only one who ever cared was an eccentric collector of rarities, who only found Data valuable because he wasn't built in high numbers.
Worf was more of a celebrity and curiosity than Data, his exotic physique more a plot point and a source of amazement for the heroes and villains. Apparently, androids and sentient machines are commonplace enough in the Trek universe, and just because Soong decided to combine the two didn't really suffice for making Data a target of scientific interest.
For some reason, Star Trek has never considered it remarkable that a machine could have the intellect of a human (or more, or less), and has only occasionally found it interesting that a machine might dabble in human emotions and idiosyncrasies. These things simply happen in Star Trek, where technology is advanced enough to make everything possible; if something isn't commonly done, it's merely because it's uninteresting or not worth the hassle. Or taboo for some reason, such as making superstrong or superintelligent variants of the human species.
Timo Saloniemi