[Ray Zee]

you guys are looking at it the wrong way. you need to see about what the added flush draw does to the hand you are considering playing. most suited cards add somewhere in the three to five % range to a hands value. more or less as the play affects it and the chances it enables you to tag along for an extra card or two. plus the times it helps you to bluff at the pot or raise for value. overall two suited helps in more multiway pots, especially when you have bigger cards as you dont lose with your flush as often.
to answer your question, i dont think any time your hand becomes playable just because its a suited hand. your two cards and positon determines your actions. being suited though, just may put you over the threshold for coming in on a hand that was close.