Life as we know here, has vey narrow conditions, but alien life could exist ot places that even humans might not exist.

A solid super-Earth has a radius that scales to the 0.26-0.27 power of its mass, relative to Earth. Thus surface gravity scales according to the 0.48-0.46 power of the mass – a 10 Earth mass planet has about 2.88 times Earth's gravity. Adding hydrogen as water increases the radius, but the index is roughly the same. For example if the planet was 50% water – thus 5.6% hydrogen by mass – then the relative radius is roughly 1.26 times what an Earth composition planet would be. For a 10 Earth mass planet the gravity is now just 1.8 gee.

Sounds alright – you'd be heavy, but not immobilised. Exoskeletons could be strong enough to compensate. Only hassle would be that the planet is now covered in water and deeper than about 100 km it's in the form of high-pressure Ice VII. Floating would be your main activity.

But I would really love to…

ElfOfGod Says:
"The zone of habitability is VERY narrow!"

There are too many parameters and all kinds of other variables like kind of parent star, planet, its density, chemical composition, orbital inclination, orbit characteristic, type of atmosphere to dare say that zone of habitability is very narrow.
You forgot also about the fact that globe the size of super earth might be a moon orbiting the gas giant and the thermal conditions on the surface of the body may allow the water to exist in liquid state.
Probably then zone of habitability might be not only singular but also very different.

ElfOfGod Says:
"We live on a privileged, created planet."

The problem is our human way of thinking – everybody is always more prone to say that our world is the most unique.
That problem was solved quite a while ago by my fellow countryman Nicolaus Copernicus when he discovered that Earth is not the center of the universe
But well… some people have guts enough to say that the Earth is flat. Really

We live on a privileged, created planet.

Cheers!

(Salacious B. Crumb, I don't want to see a scientific paper in response to my post, please.)

Why? If there are water oceans, you can still have all kinds of neutrally bouyant life in the sea.

Any land animals will not be large, but will be thick-legged and slow. No tall plants, either.

You can still have life, just don't expect anything built like giraffes or redwoods…

And as noted above, density will be an issue, too.

Intelligent life would have the devil's own time developing space flight, though.

A lot of info, catalogue of all dicscovered planets (334 as of today), description of methods, and much more. Regularly updated after each new discovery.

If two planets of different mass are the same density, it turns out the surface gravity is proportional to the cube root of the mass.

The cube root of 10 is about 2.15. Since pressure in the center of the planet would compress the matter to a somewhat higher density the surface gravity of a 10 earth mass planet might get as high as 3 or 4 times the gravity of earth. This would be uncomfortable for humans but should be reasonable for animals adapted to it.

If the diameter of the planet is larger, than even its higher gravity/mass would probably not be that different from what we have here on earth, right?

To put it another way, IIRC, gravity diminishes with the square of distance from the center of mass. On a planet of about the same density of earth, but 10x the mass, a person standing on the surface would be considerably further from the center of gravity than one on earth would be. Likewise, for such a planet, I would imagine the amount of hydrogen retained at the surface would not be unlike what is retained here on earth (i.e. none). (Although perhaps a possible source of hydrogen replenishment exists from lower in the mantle/core of such a planet?)

Am I missing something here? (I mean apart from the fact that a planet 10x earth's mass is probably at least *somewhat* more dense due to gravity-induced pressure.)

there are so many factors to account for. even the near area to the respective solar systems must meet certain requirements.