Justin

I had an original GameBoy for road trips when I was a teen.  I didn't have a Lynx.  I don't consider battery life anymore.  I would use a car adapter.  Had one when I lived out of my car for my PSP.  I loved that thing!  It had movies and games.  I had entertainment, I was content.  If I had to choose just one now, and I had plenty of content for it, I'd have to go with a PSP only because of its abilities to get online, play games, play music, and play movies.  Its sort of the all-in-one portable platform.

I kind of soured just a tiny bit on the PSP due to the battery life.  On a plane trip that's over 2 hours, it will die.  A DS will go on and on.  I suppose that's less of a problem with the more modern planes that have USB plugs.  Still, you could end up with a broken one or on an older plane. 

Car trips only?  Then any of them will do!  Fun is fun in all shapes and forms.  I think I'll choose the modern 2600 portable for a car trip.  Just like Justin, it allows me to play the games I remember most as a kid. 

I guess it's just me then.  I'm more of a what can I take that I'd get the most out of person.  I don't think of just games on long trips.  That's why I chose a PSP.  A bit slow in the web browsing department but it would work.  There are lots of free wi-fi hot spots nowadays.  And if I want to switch from a game to a video the PSP would allow that.  

If I was allowed to take more than one I'd have to pick GBA SP model with at least one Pokémon game.