Valve consistently anger or frustrate their core fanbase (e.g. the hot-air boycott over Left 4 Dead 2, the almost decade-long whining about Counterstrike game mechanics, and of course the frustration over HL3 / HL2:ep3).<p>But the fans never seem to leave, and their zealousness and numbers only ever grow. Even with the historically poor SDK support and release cycle, there's still has a solid, active modding community even as the Source engine starts to look a little tired.<p>And at the same time they're pioneering digital game publishing and distribution, providing really interesting services <i>to their competitors</i> (Steamworks), pushing the frontiers of their core game niches, and are astoundingly profitable.<p>That's an amazing example to aspire to.