Personally, I find car buying cathartic. For one--my company qualifies as a supplier for it's field viehicles, so I usually qualify for the supplier's discount--meaning the dealership it not going to make anything off of me. Secondly I usually do a fuckton of research on the vehicle I want, so anything "added value" I end up knowing more than the salesdroids. Third, I alway drive my current car completely into the ground, so any "trade-in value" is a bonus. 4th, I make sure I have nothing else better to do that day so it makes playing the waiting game pointless for them. 5th, I'm always ready and willing to walk.
So, I end up fucking with them--like walking onto the lot and yelling, "WHO WANTS A COMMISSION?!?!?!". And seeing them run.
But again, to each their own. My dad does the whole leasing thing just because he can't be arsed with the maintenance. My wife might eventually be looking into trading in her car and prefers to pay as much cash as possible. My brother is similar but unlike my wife he doesn't mind going used (even though he went new most recently). My wife prefers new.
As for me, I prefer new and as I said, I run that car completely into the ground and get my money's worth.
But yeah, I know the games they play and the tactics thehy use (IMHO more akin to police trying to corece a confession that a lawyer). Knowing that i turn the tables. I can be patient and everything.