Li Shenron
Legend
Balance among PCs is for me about equal opportunities, not equal capabilities. More "free market" and less communism (strictly meant as a metaphore, not intended as a real-life comment!). I want players to be able to create their PCs focused on a pillar or role at the expense of another if they want, not to be forced into all pillars or roles. It is therefore ok that different classes are more focused on one pillar or role, just like different races, different spells, different feats etc also do. I only need balance as a whole, so that no character feels left behind. But that feeling is important when you compare two characters built for the same role: an example of possible imbalance in 5e is Wizard vs Sorcerer, when you try to create a Sorcerer character towards a specific concept, you almost always get the feeling that you could create a Wizard for the same, and get a slightly better result due to vastly more known spells. In this case it's not like the Sorcerer character isn't good, just like there is almost always a slightly better option.
This leads to the other kind of balance I care about: competitive choices must both have a reason to exist. This is not the same as must be equal in all circumstances. An example is combat cantrips: if they all had the same damage they would be equal, but then I wouldn't like it because the choice would be mostly cosmetic, other than a minor difference in damage type. Instead 5e cantrips are designed with various trade-offs between damage and secondary effects, so that each cantrip is different but they all feel reasonably good, and even if some feel somewhat less good you can still think they can be the best choice under given circumstances. This is some kind of balance which I think 5e has achieved better than every edition, without sacrificing variety.
This leads to the other kind of balance I care about: competitive choices must both have a reason to exist. This is not the same as must be equal in all circumstances. An example is combat cantrips: if they all had the same damage they would be equal, but then I wouldn't like it because the choice would be mostly cosmetic, other than a minor difference in damage type. Instead 5e cantrips are designed with various trade-offs between damage and secondary effects, so that each cantrip is different but they all feel reasonably good, and even if some feel somewhat less good you can still think they can be the best choice under given circumstances. This is some kind of balance which I think 5e has achieved better than every edition, without sacrificing variety.