What are the personalities of shylock in act1 ?

Shakespeare's intention was not to make Shylock a tragic figure; instead, Shylock was meant to function as a man who could be vividly realized as the epitome of selfishness; he must be defeated in this romantic comedy. In a sense, it is Shakespeare's own brilliance which led him to create Shylock as almost too human. Shylock is powerfully drawn, perhaps too powerfully for this comedy, but his superb dignity is admirable, despite the fact that we must finally condemn him.

roses are red,

violets are black,

for what you said,

i hope you sit on a big fat tack.