Looking for cool mods

Go for All the Mods 3, Hexit or Tekkit

If you are looking for single mods i would say

Portal Gun 2 mod
Blood Magic
Thaumcraft
Craften Terminal
Botania
[/url]Astral Sorcery
Wizardry's
Bioms o plenty
NEI (Not enough Items)
Abyssal craft
AE2 Stuff

In case you need more, here is a list with mods that are used in most Modpacks:https://www.curseforge.com/minecraft/modpacks/all-the-mods-3/files/2756954


[url=https://www.curseforge.com/minecraft/mc-mods/astral-sorcery]