As a general rule, I keep my percentages at 70/25/5.
Occasionally my calories get up to 1900 or 2000 (usually around TOM), but I try to stay between 15-1750 and this seems to work well for me.
I do better on more fat rather than less, and never go below 65%. More than 100 g of protein slows me, too. (A note on fat - I'm not afraid of it but I do try to make sure it comes from nuts, olive oil, etc, rather than a ton of butter and cream. Not to say I don't ever eat these items, but I try to moderate it so I get the bulk of my fat from poly or monounsaturates. I do confess to loving bacon a little too much, though and eat it almost every day (3 slices).)
Not by design, but happenstance, my calories fell to around 1200-1400 avg one week, and I did not lose any faster. Keeping carbs to less than 30, and preferably 25, before fiber deducted has far more impact than cutting calories (though calories definitely count, in my opinion), but sometimes I go a bit higher.
It's definitely a learning process determining which balances work best for each of us.
K.