To be honest, there are some villains that stand out more to me than Ganon(dorf), such as Hilda and Ghirahim. I want to see more new villains than I want to see Ganon. As far as multiple forms go, he’s still all the same to me. I don’t differentiate.
When Nintendo uses a Villain other then Ganon(dorf) they always come up with something interesting. The overuse of Ganon will eventually catch up to Nintendo and he will become less compelling over time. They need to begin reusing other villains, there are very few reoccurring villains in Zelda, but they only reappear in a couple games each. Nintendo should either bring back an older villain like Vati or Ghirahim, or develop a new villain to act as a secondary Main villain. Its not that I don't like Ganon, he will always be the biggest threat in Zelda but we need another or several "Big Bads" so that Gannon can remain fresh. Some of these villains can still be in service of Gannon but not every game needs to have a return of Gannon.
That said the next time we see Big-G, he needs to be given a strong personality. Calamity Ganon is a cool idea, it is Ganon as a Force of Nature Villain (FoNV). The problem with a pure FoNV, is that they don't act like people, they cast aside the emotion a personal villain could cause the audience to feel.
This problem with Calamity Ganon is similar to the problem with early appearances of Ganon. In the 2D games in particular Ganon didn't have much if any personality he is just the Generic cool looking cartoon villain who we have no connection to. He is Bower as a Blue Pig.
This is the strength of Ganondorf. The Dorf has characterization, he acts like a real person with real motivation, we see a thinking being with a personality. There is no reason why Ganon as a Trident Wielding Pig could not also be treated as a person, but Nintendo has only personalized Ganon in his human form. One day I hope Pig Ganon gets a personality.
Regardless of the form Ganon takes in future games. The sames things can be done to make his return worth it. If we are going to give Ganon or any villain a personality, then they need to have the time to showcase and develop that personality. This is the perceived problem with Ganon in TP, BotW and Demise in SS. In these games we don't see the villain much if at all until the end of the game, so we don't get a lot time to see their personality. To many players it seemed like we were cheated out of getting time to build resentment for these characters. This is why Ganondorf worked so well in OoT and WW, we got to see them in person throughout the entire game, even getting to face off against them before seeing that we were too week to fight them and that we had played into Ganondorf's plan.
I suggest that the next time Ganon appears he should be the first villain or monster we lay eyes on. Then as the game progresses we see him carry out his plan to gain power and resist him along the way.