I'm sure this isn't true for everyone, but I've noticed that the more one chases the more of a pessimist they become towards setups. This isn't a bad thing necessarily. The more you chase and forecast, the more things jump out at you quickly that have ruined past chases. I remember when I first started chasing I was overly eager about every setup and every tornado watch. I hadn't learned to pick out the negatives yet, and couldn't recognize what was more likely to bust and what wasn't. Now chasing has become a question of economics. "Is it worth driving xxxx miles knowing I have xx% chance of busting?" Whereas when I first started I would just be out there chasing when and if I could and hoping that x% tornado prob would verify and the naysayers were wrong.
Also, when reading the pessimists' forecasts its often pretty easy to pick out their biases and take that into consideration. Your thread is about one of the most common ones I see, "This setup looks like crap .... but I can't chase." The other big one I see is, "This setup looks like crap in this state (the poster's home state) ... so I won't be chasing." That poster completely neglected a better looking target because it isn't close to home for them.