I don't. I tend to stick to what I'll enjoy (at least somewhat). However, that doesn't mean I consider everything else crap - it's simply my taste that differs from that of others.
That said, I do understand the hatred some have for products that are over hyped. I feel the same way. It is extremely frustrating to hear things like "ooh this is so fantastic! It's brilliant!", but knowing that it's perfectly mediocre.
Example:
- People go "oooh look at the NPCs in Oblivion! They do every-day things like talk to each other and walk around aimlessly".
- The same people bashed Gothic.
…
Helloooo. 2+2. Anyone? Gothic is older than Oblivion (was released around the same time as Morrowind), but had superior atmosphere and NPCs already back then! By all means, if you don't like the controls, say so, but don't call Oblivion a "revolution" in terms of NPC behavior.
So yes, I understand people bashing FO3, because it was, and still is, over hyped. Personally, I'm just a bit more moderate - I consider FO3 quite good, and while I don't like the way people hype them (both Oblivion and FO3) up as if they were the most brilliant thing since Einstein, I am still quite capable of admitting that they do a lot of things right.