Re: the tunnels tremble with anticipation.
"Orcs and goblin, same as with elves and dwarves, any of the FEW whove found their way onto the planes, are likely to visit their peoples gods realms, then settle there, never to leave.
Any exceptions tend to be freak occurences."
"Humans, are fairly populous on the planes, Humans are Adaptable, ambitious, and have no strong prejudice, towards any belief system.
"Thus A large percentage of the citys population, of all alignments and factions is human.
Some other races worth noting.
Planetouched:
This means those touched with the blood of either a Celestial, or a Fiend.
Or possibly some creature from the 4 elemental planes
Known as Aasimar, Tieflings, and Gensai
THey have a strong predisposition, but are academicly capable, at least, of fighting it, towards their parents alignment.
How much of this comes from the power of their blood, and how much because of the way their seen, I dare not guess.
I do think at least a few aasimar, choose to be impeccably honest, because they can see that people look up to them and would hate to shame them.
And more then a few tieflings, seem to hate the world for hating them.
Gensai, are influenced by whatever agent of the Elements they descend from.
They tend to display some degree of stereotypes associated with their elemental, such as Earth being loyal, but not overly intellectual, and very stubborn, Fire being rash and quick to angry, Air being scatterbrained, etc etc etc.
If theirs one thing they tend to have amongst them its aargonce, not as tainted with evil as tieflings, but not inherently disposed towards beneficience like aasimar... gensai tend to think very highly of themselves.
The Gith are another major Planefaring race.
Their divided into 2 Sub races
The Aloof and clannish, but peacable Githzerai
And the Militant and Evil Githyanki.
Rogue Githzerai in particular frequently become adventurers.
Finally Bariaur, they are predominately from Ysgard... but enough are native to the beastlands or outlands, that their not an uncommon sight in sigil.
As for true planar races... I'll say only this, Dont trust fiends, dont do business with fiends, unless you simply must...
With Celestials, Keep in mind that while Celestials are almost inherently Selfless and righteous beings... sometimes the business they serve on the behalf of a Power can overwhelm their otherwise beneficient disposition.
"I'd advice you whenever you arrive on a new plane, if POSSIBLE and it may not be, but if possible hire a tout immediately. Even the upper planes arent devoid of their own dangers."