This site has far better users than the cess-pit forums I used to dwell on, so I do give the average user here a lot more weight than usual.
It's more important to understand the perspective I think than to prove that you're right all the time.
Of course, this is the internet, which ultimately seems opposed to the notion of rational discussion because anonymity imposes on us a sort of right to be a complete asshole..or at least the illusion of it.
So I take in the general consensus and try to understand the rationale first before just jumping out there like an asshole; arguing opinions on the net might be it's single greatest pastime (short of bitching about lag), but today, I tire of the circular discussions and constant ad hominem attacks.