1.
Been playing all kinds of games before, during and probably after my stay at FFXIV, including but not limited to WoW, Guild Wars 2, DotA, Dawngate, Smite, LoL, SWTOR, FFXIV 1.0, Path of Exile, Warframe, Warcraft 3, 100% Orange Juice and many, many more, both single- and multiplayer. I'm a gaming polygamist.
2. & 3.
The game as such? The character within the game? Design directions? Question unclear!
Gameplay-wise, I tend to gripe over things. For one, I'd love a barrier-free Eorzea where you can walk to the beach, jump into the water, get carried out into the open sea and die a horrible death to fatigue and drowning rather than being blocked in ankle deep water by an invisible wall already. If I want to jump down a bottomless pit, fade to black and respawn me at my home aetheryte instead of blocking the fall >.>
Jumping puzzles and jump'n run elements in general are a little underexplored IMO. Swimming is a nice start, but it's likely going to be very on-rails as well and restricted to a select few areas.
I'm not fond of the power of tanks and healers either. That's mostly for two reasons: For one, I find the constant debate over the DPS meta tiring, for another, because I really dislike the design abominations SE has to use in order to make challenging content. Insta-kill and insta-wipe mechanics don't file under "fun and engaging" for me. As a result, I find the challenging content in this game annoying and would wish for more solo challenges instead (And ideally, ones that don't require you to farm aetherpool and consumables or bombard you with RNG). That's likely going to continue to be a gripe of mine, since SE has shown no signs of it changing.
Further, I'd wish the combat pace on low levels would be quickened. I find it quite good at max level, but the low levels feel slow as molasses.
Gear progression, I'm fairly indifferent about - I frankly don't care about stats. I get them because I need to, but other than that, I have no interest in them. I've always cared more about glamour/appearance and the current cash shop trend leaves a sour taste in my mouth. Kinda wish I could trade other game content in for the items. I'd get more value out of a pretty dress than Diadem, EX trials, Aquapolis, Hunts, Gathering or Ranked Feast for sure, but unfortunately, the latter, not the prior are included in my sub.
The story, I find daunting. I like that it's there, but I don't like that it's mandatory for just about anything. I'm one of those crazy people that have alts, so I tend to go through it 7 times. Hearing Stormblood will have even more MSQ makes me want to /wrist. It's another gripe of mine: The game is fairly alt-unfriendly. At times it feels like playing more than one character should come with a discount, rather than extra cost. Exacerbates my cash shop issue, naturally.
In spite of my many gripes... I do still enjoy the game. Less so than I used to, which is evidenced by me spending far more time on the forums and less in the actual game, but still enough to justify my sub.