Blockoman, Give me links to these mods:
Somnia - makes beds work much better, actually simulating the world while you sleep.
Smart Moving - lets you crouch, sprint, swim like a pro, and hoist yourself up onto 2 and 3-block high ledges.
Pathing Activated - Gives all monsters a sense of smell and hearing, as well as improving their pathfinding. You can tweak everything to your liking.
Matmos - Adds ambient sounds to the world, making the atmosphere interesting for once.