(1) how compellingly the extraneous offense evidence serves to make a fact of consequence more or less probable--a factor which is related to the strength of the evidence presented by the proponent to show the defendant in fact committed the extraneous offense;(2) the potential the other offense evidence has to impress the jury "in some irrational but nevertheless indelible way";
(3) the time the proponent will need to develop the evidence, during which the jury will be distracted from consideration of the indicted offense;
(4) the force of the proponent's need for this evidence to prove a fact of consequence, i.e., does the proponent have other probative evidence available to him to help establish this fact, and is this fact related to an issue in dispute.