If you want to get technical, we do breathe "under water"

Water vapour, air canisters.

And by breathing, do you mean respiring or taking oxygen into your body?

Taking oxygen into the body = "breathing".
Respiring is something else entirely.

oh yeah, isn't respiring about putting oxygen into the blood?

/TiredFail

Turns out, I am not a plant afterall

oooh and we should be able to not get sunburned..hate that

I like the human body as it is, it does what it needs to do fine.

Same, I also get ginger-er, more freckles.

Ogris, go outside with no clothes on, and stay there for an hour.

You will want more fur.

We use other things to make up for what the human body lacks.

It's still fine as it is, we just use tools to improve our abilities.

What Oggy said, the reason that we, as a species, are pretty poorly made is because we evolved past the need for special traits. AFAIK, we only have 3 major special traits - high intelligence, opposable thumbs and walking on 2 legs, and that's all we need.