Yeeeeah! How about this?  
Got myself a boxfresh GBA micro for next to nothing, and I'm pumped! Gaming old-ass games on a postage stamp sized screen is my definition of fun, or at least A definition of fun. A weird one, I suppose, but be that as it may, I'm going to make my way through the original Metroid the only way I know how!: Totally by the seat of my pants, with no sense of direction, cursing at the screen! And if I eventually finish that, I got Metroid Fusion for about a buck fifty some months back, and that's a good one too.   
 So, in effect, I have stepped into a time machine, gone back to 2005, just went to the movies to see the chronicles of Narnia, and I've got my  headphones on, rocking out to Hollaback girl....oh god!!!!!! TAKE ME BACK TO THE FUTURE!!!!! 

The Gameboy Micro is a cool thing to have, soo many GBA titles are still great to play. Sorry to say though your idea of retro is way off. I cant think of anything post SNES/Genesis era as truly retro yet. If you said something like Im going to go play my Vectrex I would think of retro gaming, not playing GBA games. 

You know, dude, you might think my idea of retro is way off, and of course you're entitled to your opinion. But if playing games made in the mid eighties (Metroid, Dr. Mario) on a discontinued system doesn't at least  partly qualify for retro gaming status,  I guess I'm just not hardcore enough. Or old enough, that might be it.  I know these are not the original games on the original system, but it's kinda rough trying to lug a NES around in my pocket.  Just saying that my point was the old games, not the not so old system. 
 
The fact that it's a cool thing to have, though, THAT I agree with! And if you have a Vectrex, more power to ya!  
 
Good evening/day/whatever time it is to you!

Good for you duder!

Radical. I never even saw GBA Micro. Actually I saw more plates/covers for it to buy than the actual hand-held.