Out of loyalty to the brand, I played them right up until they introduced the stupid skateboard controller. Not entirely out of protest, you understand - I can't skate in real life and, even if I could, I don't have the space to use that sort of thing.
Problem is, the Tony Hawk games haven't been good for a long time now. By my reckoning (and most people who've been with the series since it started), the last truly excellent one was THPS4 way back in 2002. It all started to go wrong when the developers decided these games need storylines. Underground was less than brilliant; Underground 2 was abysmal, the worst in the series by a considerable margin. I actually quite enjoyed American Wasteland, perhaps because the storyline was only 'pretty stupid' rather than the 'double-strength retarded with a side of bullshit' of the two that came directly before. I barely even remember the two that came afterwards, to the point where I've been thinking of re-buying them just to see what they were like. All I really know is that the last one was made completely confusing and redundant by the fact that I was playing Skate right alongside it.
So... yeah. It's sad, but what was once my favourite franchise in all of gaming is now all but dead to me. I'll be open to revising that claim if they revert to regular controllers, but even then I'd still have to rent the game before buying it. There's absolutely no way to say this without sounding like some sort of retro idiot who's afraid of change, which I'm not, but I'll go ahead and say it anyway: long story short, the only way they'll get me truly interested again would be to go back to the style of the first three games. They demonstrated little notion of realism, it was frustrating as hell to run out of time just before achieving an objective, they had no storyline and no sense of context other than "you're here to skate, go do that"... but they were brilliant. That shit just worked.