Turns out I do not especially like turn based combat, about the only instance I truly care for it is probably Might and Magic where you can turn it on at will, effectively turn the game into easy mode (ish) and do whatever needs doing.
For the more real time stuff now that I think about it probably area changes (defence, attack, weapon viability enemy type changes/perks for ground area....). That said it is there because it is the main unifying idea from my big three most liked games this go around (Resonance of Fate, Eternal Sonata and MagnaCarta 2). On the flip side I can not stand monster hunter (tried several times, can't do it) so I am not sure what goes there. Equally the "forced" dungeons of final fantasy games have not always been my favourite; the no metal weapons sections I detested, the best if you do not have magic users (which I promptly did go with) vary in my estimation from month to month, many of the actual forced character sections.
Thinking further those are probably some of the few games I really enjoy the combat rather than stories, world/dungeon exploration, crafting and fiddling with equipment with the TBC being a/the chore. Others probably sit as the megaman battle network series, the summon night swordcraft story games and for the sole concession Skies of arcadia but only because it had one of the best implementations of what I am about to cover.
If I must do turn based then move combos (button pressing challenges.... vary) and forethought/enemy prediction being tested. Probably why I like Phantasy Star 4 more than final fantasy 1-6.
Elementals... if done right then maybe but most times it just seems to be a boring memory test, obvious, an extra step as I need perform the analyse spell or "do I have a faq to hand". I more enjoy the "douse them in fire oil and then...." or "they have armour you can disable/partially negate giving you an opening" approaches. That said buffs have never been a thing I like, pay attention to unless mandatory (even going as far as to grind to avoid it) and though I probably would have to say something about pokemon at this stage it probably joins monster hunter in "games with elements that are interesting but in practice fall short" but as I enjoyed several of the "clones" (robopon, demi kids, medabots) that is a different matter.
I think I shall end it for the time being by saying everything that would be turn based could probably be better done if it was puzzle quest.