If i remember right,the Kiths and what the represent,its something like this:
Boggans,made by the dreams charity,service and sometimes vengence,they are the house protectors between the fae,in appearence they remember the Halflings.
Nockers,made by the dreams of creation,inventions and craftmanship,are something like Gnomes,but with a foul mouth and short temper.
Pooka,made by the dreams of freedom and tales,are pesky shapeshifters with animal forms,some characters from tales resemble perfectly a Pooka,like Alice's White Rabbit,oh yes,they can never speak the truth without masquerading it with lies.
Redcaps are born from the nightmare,the fear from dark and the cold that comes with the winter,they consume practically everything they can put on their mouths,a normal Redcap looks like a gray skinned person but with a mouth like the ones you would see in a tarkatan mouth from MK.
Satyrs are born from passion dreams,and live by the passion for life,i think i dont need to describe Satyr appearence to anyone here,since they are well know.
Sidhe are born from dreams of beauty,perfection and nobility,needless to say they are the main body of the fae leadership,they resemble humans,only even more beautiful any human could ever be,their elfin resemblence could mean they could even be reference material for what would be the modern fiction elves appearence.
Sluagh are born from ambiguous dreams,since death,decay and the secrets that must be unveiled arent exactly everyone's dreams,they are the spies and info traders of the fae courts,if you could trace a Sluagh appearence based on something,i would probably use the Matriarch of Adams Family.
Trolls are usually depicted as enormous dumb things that eat anything that invades their territory,this is usually the Unseelie trolls,a Troll is born from dreams of Honor,Duty,Strength and Vigilance,resemble big and monstrous humans,with grayish/blue or green skin,they are stubborn and oath binded,so if you see a troll that never leaves an specific place,its probably becuz he is oathbound to protect that place.
There are more kiths,like Clurichauns,Piskies,Eshu and Selkies,but these are a little more specific and the text is already enormous enough