The straight flush draw is NEVER worth chasing but its a bonus if you have a str8 draw and flush draw. NEVER draw at the str8 flush, your drawing to one card, but when u have a str8 flush draw u also have the flush draw and hope no one else has a bigger draw. So throw the one outer out of ur mind ur really playin just the flush draw and str8 draw, if u happen to hit the str8 flush then WOOOHOOO but thats not what u wanna play for