There are several variants of roll your own (all players are dealt only down-cards, they have to choose one down-card and turn it face-up for the others to see) 5-card Stud, known as Mexican Stud.
Mexican Stud usually involves some sort of changes to the regular 52 card-deck, the most common of which is to have 8,9 and 10 stripped from it. The addition of a single joker will make a 41-card deck.
Straights will be possible (like 5,6,7,J,Q) and the flushes will beat the full-house, since – because of the reduced deck – they’ll be much more difficult to obtain. The Joker added to the deck will be a bug if it’s a face-up card, and it’ll act wild, if it’s face down.
The bring-in is paid by the high card on the first round, and the game is a choose-before roll your own.
The choose-before means, that whenever an up-card is dealt, the player has to choose whether he wants to receive it face-up or face-down. If he opts for a face-down card, he has to turn one of the cards he already has, face-up.
When a game is played with a choose-before, the deal usually starts with the highest hand showing, and not on the dealer’s left