I've made one straight flush in my 7 yrs of playing...and since it's in the BB thread...you know that I lost.

5/10 NL (start with $2200)
EP limps..hero limps (approx $3500)...I raise to 75 from the button with 8h9h. Blinds fold, EP folds, MP calls.

Flop (Pot = 175)

:-::-::-:10h Jh Qh:-::-::-:

Hero bets 100. I call.

Turn (Pot = 375)

Kc

Hero checks. I bet 400. Hero calls.

River (Pot = 1175)

10d

Hero bets 500. I raise to 1100. Hero waits for a few seconds...checks his cards...and calls.

I turn over my straight flush...he turns over...
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Ah Kh

That's right. Not only did I flop a straight flush when he flopped a royal flush...I got slow rolled by the nuts. At least he was nice enough (read dumb enough) to leave me with $525 in my stack instead of taking it all from me on that hand.