We as a group of 20 people want to set up a server and are still looking for the appropriate modpack.
Our ideas are that it is not too hardcore, that you can still build houses, for example, but it is not played through quickly and you can do a lot. It would also be great because you don't kill items when you open the inventory and you can't get endgame tools or items without slowly working your way there. It would be a shame if the majority of the modpack does not come into play because after hours of work you have an endgame item that makes the rest of the modpack boring.
Finally, some kind of dungeons or something similar would be great if you have already worked your way up and, for example, have awesome armor that you can do something with.
Would recommend Hexxit or Attack of the B team, maybe Tekkit too
Maybe Sev-Tech is there, you play through numerous mods. I only mentioned it because it is very "linear".
Crackpack 3 offers pretty much everything you mentioned.
It offers a lot of exploration through Ancient Warfare 2. Has different dimensions to explore like Twilight Forest, Erebus and Betweenlands. Mega Loot gives you the chance of a lot of different blatant armor and weapons. With Galacticraft, space is added. There's also technology. With Wizardry and Astral Sorcery magicians get their money's worth.
An FTB Modpack runs very smoothly. My favorite: FTB Infinity Evolved.
