If you are looking for
- a mellow and fun experience --> SkyOdyssey (FTB Quests)
- a clucky (farmlike) experience --> ChickenBlock (FTB Quests)
- a deep and dwarflike experience --> Stoneblock (Originial one by Sunekaer) (Better Questing)
- a hardship and sweaty hours --> Enigmatica 2 Expert Skyblock (Better Questing)
- even more sweat and some blood --> Gregblock (Better Questing)
- an exhilirating and hardcore experience --> Project Ozone 3 A Way Forward (Better Questing)
- a completely different approach and unconventional mods --> Skyblock Billionaire
- a midranger --> FYM Skyblock
- a cleverly designed interlocking mod questing --> Project Equivalence by NimbleNinja or Equivalent Skies by LimePixel
- a perfect escape story (had great pleasure in this grind, every minute of it) --> Break Out by acanthea
There are others modpacks that focus on less popular mods like calculator, compacting machines and bees. I have played and finished all of the modpacks in the list above. Wish you the best fun.