I've noticed I feel better & have better "weight-loss" days when I keep my fats around 30%, protein $30% and carbs 40%. I adore avocados as well- a little citric acid (find it in the canning section) does wonders in keeping the fresh color without any aftertaste like lemon or lime juice can.
I had a magnificant sandwich at a restaurant last night- marinated portobella mushroom grilled with fresh spinach leaves, goat cheese (just a bit) and avocado on a toasted bun. It was so amazing I'm drooling just thinking about it!
(shh- it was probably the brioche bun that put if over the top- but don't tell!)