I suppose there are three battle systems of RPG variety that have appealed to me:
Xenoblade Chronicles: The real-time combat of this game is a breath of fresh air, and sort of reminds me of how WoW operates, especially in regards to arte selection. The combat allows for the game pace to be relatively seamless (with the unfortunate exception of encountering a hoss of an enemy and being forced to flee)! It also forces the player to think on the fly, leaving the room for error much narrower.
Tales of Vesperia: The Tales games' semi turn-based combat is also somewhat refreshing. The pace does break, but there is a ton of movement involved in the combat, which occurs in real time although the movements are somewhat limited. I liked that this title in particular allowed for more free movement, which is especially useful in evasion. I did not like the Limit Break concept as much in this game. It was not necessarily bad, and it was useful, but I preferred the combination attacks from Tales of Symphonia since they paved the way for large and spectacular damage (not to mention the attacks looked cool)!
Legend of Dragoon: The PS1 title was an interesting game, and also very long. I never quite finished it since I never actually owned the game myself, but the combat was very interesting. It is turn-based, but inflicting attacks involved pressing buttons at the right time to inflict combinations, or what the game calls "additions." There were more traditional abilities as well, but the addition system added a layer of skill required to fight effectively in light of the traditional turn-based action.
FF15's system is best. None of this turn based stuff. I like to be in control of the action and for the character to respond immediately when I press a button.
I initially recalled this question as familiar, and upon further discovery it seems you made the previous thread as well! As such, I've found my old response, all three of which I still hold high as good battle systems.
Thinking about the last of these three in particular, I can always appreciate when turn-based combat shakes up the formula with methods like the aforementioned "additions." I think I would like to add one more RPG to the list (unfortunately I haven't played many other RPGs these days).
Ever Oasis: I'm cheating a bit with this one as it is more action-adventure with its combat, I'm including it due to its RPG-esque party system. The combat is dynamic in nature and ordinary attacks operate very similarly to how Warriors games have combos. The character abilities operate within the same framework. Come to think of it, the overall structure of the adventuring in this game reminds me a ton of Mysticaal Ninja: Starring Goemon for the N64. I should really get back to this game.
While I haven't played XV, the combat looked awesome from what I've seen in videos. Very dynamic, it seemed!
I knew it sounded familiar when I made it but didnt see it on the page.