Zvik2246 is right - everyone's answers will differ. What works for me might not work for you, and Zvik2246's material might bomb when I do it.
Also, the venue makes a difference. Impromptu differs from busking, which is different than table hopping, which differs from strolling.
You have to find out which ones work best for you where you perform. Everyone's answers will be different.
Also, I think that french kiss is an exception to the rule. If you can do the sleights, you can and will get killer reactions. Although if your not a showmen I would recommend not talking at all during the performance, but instead just indicating and using hand gestures. French Kiss hits everyone, everywhere hard. It needs no presentation, nor a good magician. The effect simply kills. I'm sure there are plenty who disagree with me here... but I stand firm. The only trick I know that hits like French Kiss is TCM, and that requires some damn fine presentation to work right.
Also, I think that french kiss is an exception to the rule. If you can do the sleights, you can and will get killer reactions. Although if your not a showmen I would recommend not talking at all during the performance, but instead just indicating and using hand gestures. French Kiss hits everyone, everywhere hard. It needs no presentation, nor a good magician. The effect simply kills. I'm sure there are plenty who disagree with me here... but I stand firm. The only trick I know that hits like French Kiss is TCM, and that requires some damn fine presentation to work right.