I'd rather companies catered to my wants and needs as well, but I'm not sure they could remain in business if they revolve their marketing around me. I owned Nightlife, 2nd edition I think, and at the time Vampire was just so much more popular that it wasn't even a contest. I don't know if there's a lot of interest in Nightlife today. On occasion I might hear someone mention Nightlife, but rarely does anyone wax nostalgia about it.
There is as point where games are, at least superficially, similar enough to what is already popular that there doesn't seem to be a point in buying them. Candela Obscura and Arkham Horror might be good games, but if they're doing the same thing as Call of Cthulhu then why would I buy them? The same goes for WitchCraft. It might be a good game, but if I've already got Mage, then what do I need WitchCraft for?