I've never been very keen on 'licensed' games (official or unofficial), and recently I've been put to the test on it. In the last few weeks/months I've been invited to play CoC, Dr Who and Serenity; also, Lankhmar was suggested for Burning Wheel. My reaction in each case has been 'Meh.' In the past I've also tried Star Wars and Star Trek and they too fell flat.
I see a lot of enthusiasm on RPG.net and other forums for this sort of thing. Am I just curmudgeonly or is there a deeper structural reason for my lack of enthusiasm? What are other people's reactions? I know of the 'underbelly' technique, by the way, and that doesn't do it for me either.
It could be suggested that it's a matter of 'other people's settings', but I played happily in Glorantha for years and I still would be happy to play in that setting. My off-the-cuff diagnosis is that Glorantha is a setting designed from the ground up for gaming, while eg Star Wars is not. I wouldn't mind probing more deeply into this.