The "filling ability" is the ability to always fill thing again. No matter what.

Sonic Manipulation.

The ability to learn anything instantly like in the matrix.

Reality warping

Yoo reality warping would be so rad you could warp somebody else's reality so they'd do what you want, or warp your own to make a reality where there's chocolate cake or money in front of you that would be so cool

I could give myself any superpower, change whatever, own whatever, get away with whatever, I could be a GOD AMONG MEN
Or just a regular guy, idk

So you'd also be Franklin Richards

Healing... that'll do me and others a ton of good
Or fusing like in steven universe

Like healing by touch

The superpower of probability. So I could make the probability of me winning the lottery 100% or the probability I'll drop my phone in the toilet 0%.

So you'd be Domino

Reincarnation. Live this life, die, turn into a cocoon, and repeat life with a different body. Eventually I'll get to FTL space travel, and watch as the world changes and me along with it.

If I had to pick one out of seriousness... Whatever the hell Dr. Manhattan's power is defined as (it's more than just Molecule Man since he can see into the past and future).... but if I were to just dick around in the real world? Human Torch. Anytime I leave a building my inner child comes out and in my head I yell "FLAME ON!"

Dr Manhattan is a reality bender

Flight or teleportation.

Dr. Manhattan is a fucking god. He's meant to be as well; most of the time humanity is a literal joke too him.

It takes some really fucked up shit for him to even think twice... even with his awesome Mars glass thing.

Just Wanna be as Lobo.

More time

And the way technology is going we may get that superpower during my lifetime anyway