>>24915875Listen to this anon. You can't go wrong with any of them outside of the original releases of Diamond/Pearl due to really bad design choices and oversights that are corrected in Platinum.
HGSS is a good choice as well, at least if you've played GSC before but it doesn't fix some issues of the old games like having a janky difficulty curve.
So either Platinum, HG/SS, or BW1 -> BW2. BW2 is the funner of the Gen 5 games but there's a lot of things BW1 has going for it too like having an actual story besides being a badge collect-a-thon and the embargo on catching any mons from previous games until after the main story is complete. BW1 is best as a blind playthrough because of this.
And if you want to move onto the 3DS games like
>>24915919 suggests, play XY. There's things that are arguably wrong with it but there are truly no "bad" Pokemon games, just a lot of questionable design decisions depending on your perspective.
Similarly, ORAS is good too but it can be rather underwhelming especially coming from Emerald.
