Good questions. I didn't mention that I cook the chicken in bacon fat and add bacon to my salad. I use either canola oil or olive oil on my salad, but I'm going to drop the canola oil once I run out of it and stick to the olive oil only. I started using canola oil after reading about it on Clarence Bass's "Ripped" website (www.cbass.com). He's a big proponent of it based on the omega ratios.
The above example is one of my low calorie days (about 2,500). The only thresholds I set for myself are at least 185g of protein (1g per pound of BW), less than 150g of carbs (I used to be at 200g/day), and as much fat as I want. In the example day above, the fat comes out to about 150g (50% of total calories).
Lately my appetite has been increasing a LOT. I've been following a pretty intense heavy weightlifting and Crossfit regimen which I think has contributed to that. So I've been increasing my fat and protein. Yesterday I ate 3,600 calories and 210 g of fat. I added in some whole milk and cottage cheese which I had shunned when I first started Paleo. I'm kind of at that point where I'm pretty lean and actually wouldn't mind gaining a few pounds if it meant added muscle and strength so I'm going to experiment with higher calories and added dairy. I'll keep you guys updated with the results.
The reason that I eat lean meats is the simple fact that I prefer them over the fatty cuts of meat. I'm not sure why but I've never liked the taste/texture of animal fats. Not a big fan of chicken legs, thighs, etc. - I just don't like the taste. I have the egg whites for the added protein. Although eggs are great it takes a lot of them to get a measurable amount of protein.