You've heard of vanilla plus modpacks, but I bet you haven't heard of chocolate minus modpacks... until now. Chocolate Minus is a project I've been working on for a short while with the idea of enhancing Minecraft's base game in mind.
Basically, the point of this pack is to refresh vanilla gameplay and make it interesting again, but without driving the player to do otherworldly things like build a rocket to go to space or tame a dragon. This pack is here to provide a vanilla experience, but a new one nonetheless. There's mods that change features slightly, and other ones that changes features entirely. Overall, however, the pack still has that "vanilla" feeling, which is the goal entirely. As for in-game questing, follow the in-game advancements. There's no real "goals". Just have fun with this.