Hmm...this seemed like a stupid idea for a thread at first, since first of all, it didn't mention SoulSilver, the better of the two, in it's thread title. ;) And also because I think HG/SS is better so far. BUT, then I read some of the comments, and most of them are very good points.
For one thing, I also hate the new PC system. It seems like I'm always switching between the touch screen and buttons. They don't have it organized well at ALL. Aside from that, the music is awesome, the graphics are nice, and there are some new story elements and areas to visit.
I haven't beaten either(In SS I'm trying to beat Chuck, while in Pt I'm trying to beat Volkner), since my DS broke, but so far, as story is concerned, Platinum was WAY better. But, that's not the only thing to consider.
In HG/SS, you also have the Poke-athlon. I mean, some people may take that for granted, but if you have any idea how much time and effort the developers must've put into it, it's pretty dang huge in itself. Not to mention, those little games are pretty fun, too. HG/SS also hosts the return of the ever-loved Battle Frontier, right where the old Battle Tower used to be in Crystal.
In Pt, we get Looker. woo. Personally, I think he's REALLY annoying. In HG/SS, we get the return of Eusine. He's less annoying.
Lastly, the Giratina battle music in Pt is so darn cool...I mean, it's fast, it's scary, it doesn't use the same kind of musical style as the rest of the music in the game(Anyone else notice the musical repetition in all the pokemon games? in RSE we got a lot of "Bum, Bumbum. Bum, Bumbum". XD). I saved right before him and replayed that battle five times before I finally caught him with the master ball. It's really too bad I don't get to do it again. D=