HG/SS and OR/AS, if I'm being honest. HG/SS just has the highest replay value for me. Always has. OR/AS kind of saved Gen 6 for me, and Super Secret Bases made them really fun. Even though I'll never replay OR/AS, I did have fun and enjoyed them more than some of the other remakes.
FR/LG were just.... eh? To me. They didn't really add much from R/B/Y except the Sevii Islands and made Kanto easy to play, but they had a lot of problems, imo, like not including the new evolutions in the Kanto Pokedex and forcing Golbat to not evolve by stopping the evolution automatically. Not to mention, not letting you trade with R/S/E until you completed some stupid sidequest.
Never played LGPE and I never will. I am by no means a competitive battler, but I really don't, and never will, like the idea of stripping Pokemon down to just wild catches instead of battles. I'd rather play Pokemon Go instead.
As for BDSP they were...alright, I guess. I enjoyed them, but when I was finished with them, I set them down and haven't really cared since. I've already moved onto Legends Arceus which is leagues better of a Pokemon game. I mean, they were cool. I love Sinnoh, but the games were clearly rushed out the door for a holiday release and had a lot of problems. They also released the game without everything unlocked and had to release patches to add them in which is just... bad, let's be real.
I honestly still think remakes past HG/SS aren't really necessary to begin with, but I guess, in this day and age where not every Pokemon will be available to even put forward into newer games, there will be more anyway.