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.
Dustcoin shows something diff for trc every 30 mins. Now neg. Now this is due to bouncing diff... But it sure does not instill confidence in me to switch from nvc, at the moment, to it.