There's so much to do in this game, as a relative noob. It's almost overwhelming. I finally finished the base game MSQ. I'm level 52, I think. I also had a sex change. I'm no longer a hot dark elf(or whatever they're called in FF) chick.
I'm level 80, and fairly casual both in time spent playing and playstyle. I put maybe 20-25 hours a week in the game, and I enjoy most aspect of the game, gathering, crafting, housing, beast tribes, golden saucer, duty roulette, leveling other jobs etc...
And I'm still overwhelmed at 80 with too many things to do. A lot of what I like to do would be considered a total waste of time by most people on this board.
For example, I'm getting low on shards for crafting and have access to 3 gardens, 2 on my house, and 1 on the FC house. So I've been going around everyday gathering 24 grade 1 shroud topsoil, and 24 of the seeds required for crystal and then plant 24 seeds. This takes me about 30-45 mins each day, but gets me about 1500 shards a day. I'm almost done now getting everything back to 1500-2000.
I also do my Beast Tribe quest, the Stormblood because they are great xp for leveling alt job like my Gunblade 65 now. I do the Heavensward as a completist to unlock the rewards.
Since I'm working on the Free Company Airship, I need TONS of company seals to buy crafting materials...around 200K for the next upgrade. So I do 1-2 Trust to get a bunch of green items to turn in for seals.
Just these 3 activities have been taking my entire evening of playtime. No time for duty roulette, my Red Mage still has some quest gear on. Haven't had time to decorate my house much, no time for golden saucer in like 2 weeks.
I'm still at floor 40 of PotD since I haven't found time in like 2 weeks to get to 50.
I'm having a blast having so many things to do, but at the same time it's almost frustrating because I'm doing so many things, I'm barely making any progress on any of them...but I wouldn't change a thing really.