Well, one thing you can do is remove your battery entirely and run only on the brick to get a sense of what is "within normal limits" for what you typically do.
The battery itself is generally acting as a buffer.
But in any case, don't overthink this. A power brick can get uncomfortably hot to hold in your hand but not be "burn me hot" when it is being required to power a laptop that's cranking at full tilt for a particularly processor and graphics intensive game.
If the system is working, and working as expected, under the conditions that you use it then it is OK based on what you've offered so far.
I am guessing from your last several responses that either your machine is new and you're having the usual "new machine smells" or that the smell part is not of the "oh, my heavens, something's melting" level.
