I'd like to see one of the sites like dustcoin offer an option to show average difficulty over a past time period instead of just current difficulty. Or maybe graph the profitability over time. Then we could make more informed decisions. 
Edit: Right now we're at minimum difficulty again and dustcoin says 600% profit level. Personally I'm mining TRC coins effectively solo, I'm testing a new pool I'm working on. Have found a couple coins the past couple days though, so I don't feel I'm wasting my time with my single GPU, lol. And a 20 coin block turns into a few dollars on BTC-E. Generally, I sell all coins as I mine them. I'm much more interested in mining/pooling than currency speculation.
Edit: Right now we're at minimum difficulty again and dustcoin says 600% profit level. Personally I'm mining TRC coins effectively solo, I'm testing a new pool I'm working on. Have found a couple coins the past couple days though, so I don't feel I'm wasting my time with my single GPU, lol. And a 20 coin block turns into a few dollars on BTC-E. Generally, I sell all coins as I mine them. I'm much more interested in mining/pooling than currency speculation.