I count mine. For me it helps me keep track of my nutrient intake and manage my weight (which isn't a huge deal in pregnancy, as we WILL gain, but I gain a LOT each time and so I just want to keep it in check and not gain more than I need to...which is already like 40-50lbs based on my last 4 babies!). I do add the typical 300 (and more if I am still nursing during the pregnancy), and I'm around 1850 for my calorie goals, which is sufficient for my body. Since you have become familiar with your needs you likely know what you can/cannot do, so that's definitely different than just some random woman choosing a number just based soley on that number. Some women DON'T need as many extra calories...some need more. So you definitely have an advantage with already knowing your body and your metabolism! Just be prepared to adjust if needed. Even despite my bodies ability to pack on 1/3 of another me during pregnancy, if I plateau for too long, I know that I need more. I also found my "perfect" intake/exercise amount when not pregnant, which is NOT the exact average recommended for me (I tend to need more to maintain/lose, and gain if I get too little, but also gain if I get just over more than my "perfect" amount) so I was able to adjust my calories for pregnancy based on that, not a textbook number (because I'm not a textbook body, neither is anyone else).
Me (30) DH (33) Married 12 years!
Mama to 4 in arms (ages 10, 8, 6, 3) and 11 in Heaven
Thanking God for a new little one coming our way in 2016!