First off, I do both. I rock out on the keys if I'm in the mood for that...or bust out flipping samples if I'm in the mood for that.
Secondly, lotta people saying sampling is coo if it is done right, but what I say is any beat is coo if it is done right. So many Bay "producers" think they're Triton beats are the shit, but they sound like playskool doo doo. On the other hand, so many jackasses think they "produce" hiphop cuz they looped a played out sample and added some weak ass drums. There is good and bad with both, simple as that!
The main misconception with sampling is that many people don't know how to do it properly. Finding a corny, played out loop...and then adding drums is doing an injustice to everyone. People need to quit Diddy looping their shit! The average fan/person and many "producers" do not understand (nor can they execute) the concept of chopping a sample, then rearranging and layering it to your tastes. To say sampling is a cop out is unfair...tell that to someone like DJ Premier, someone who meticulously chops specific sounds and phrases and composes totally NEW music out of it. Lots of "producers" just don't know how to flip a sample and create something new out of it. On top of that, muh fuckas don't know how to utilize filters, oscilators, envelopes, effects, etc etc...
I mean with the synth beats...you got people with no musical ear whatsoever making what they think is tight. Too many toys pressing down on keys with they vienna sausage fingers, generating a whole lotta noise and not enough music. Then, like I mentioned before, there's the busters with their MPCs and generic ass loops.
I don't care if someone samples or someone makes synth beats, just make sure your shit sounds tight. I appreciate good music, and I hope most people do too. I can get down to a DJ Quick beat just as much as I can get down to a DJ Premier beat. (And I don't care what anyone says, making a beat from scratch is way harder...but at the same time, don't think just beacause you do that, you are good.)