What Qualities/Features should a good Altcoin Must have?

[parishy]

There are alot of shit altcoins some are good too tho

so i am dying to know how a alt coin should be 

how many coins 
POS/POW ? 
how many POS %
How many Reward per Block
Algorithym 
should be distributed through airdrop or not 
etc..
what you think a altcoins Should look like ?

if you were launching a coin , how would you set up your coin ?