I'd love to see Plants vs. Zombies here. :)

Depending on GOG's relationship with EA, while I wouldn't mind seeing Popcap Games here, if GOG do get the chance to bring more games here , they'd be much smarter going after far more highly-desired titles, like big-budget EA games on Steam (Mass Effect 1-2, Dead Space 2, etc.), C&Cs, Sims 1, Theme Park World, Beasts & Bumpkins, etc.

That sounds logical indeed. EA has its own BFG-s like older Need for Speed games, C&C, The Sims, older Battlefield games, etc.
But when it finally happens, they should release it as a "Platinum" bundle, with its own integrated selector software.
They should include (in an alphabetical order): Alchemy, AstroPop, Atomica, the Bejeweled series (1, 2, Twist, 3), Big Money!, the Bookworm series (OG + the Adventures Duology), Chuzzle, Dynomite, Gyromancer (Square Enix also has a lot of games on GOG, if I'm correct.), Insaniquarium, Mummy Maze, Peggle series (1 and Nights. Personal opinion: I'm still waiting for the 2nd part's PC port), Plants vs. Zombies, Rocket Mania, Seven Seas, Talismania, TipTop and the Zuma series (1 + Revenge).

I know PopCap has weak DRM protection (time-limited games are way too easy to crack and limit progression is limit progression), but I'd see this as an absolute win for both of us. EA/PopCap gets its own money and we can finally do some nostalgia.

classics?I havent even heard of them
so no i dont

PopCap Games made some of the best casual PC games ever. It was so much fun !
I used to play Insaniquarium, Heavy Weapon, Big Money and AstroPop all the time on the family computer.
If one day they put the full collection on GOG it's an instant buy from me :)

I'm more thinking of Astraware, like Bejeweled and Peggle. So whichever those are.

How I wish Insaniquarium and Plants vs. Zombies were on GOG.

Well, not only popcap games, I loved some games by alawar and by bigfish and there are some others, but who can remember them all.

Yes! PopCap Games are probably the games most played at work in the whole world.
Definitely they'd be a worthy addition to the catalogue.

There is a thread on the EA forums requesting more games being brought to GOG

https://answers.ea.com/t5/EA-General-Questions/Now-that-EA-is-putting-games-back-on-Steam-please-consider-more/m-p/9180251#M343628

I know it would be a long shot but they do have people monitoring and reply to posts so having more people requesting games to be brought to GOG the better the chances they will see there is actual interest rather than just a handful of people.