I found my weight went in stages. I lost nearly all my pregnancy weight quite quickly after DD2 but there was a couple of pounds that wouldn't go until she was about 9mo.
I've found that I just can't curb my snacking habit so I've started keeping plenty of healthy snacks and banning sugary stuff from the house. Popcorn is a good one, it's got hardly any calories in if you don't smother it in butter or sugar.
Also started running which bizarrely seems to make me less hungry.
I didn't loose any weight while BF. Didn't gain any either, and remained a good 1.5 stone heavier than my pre-pregnancy weight.
Once I stopped BF (actually, as soon as baby was only on one feed a day) my appetite decreased straight away, but the bad habits remained. Once baby had stopped BF altogether (on Christmas Day!), I made the desicion to loose weight. Stopped all the stupid snacking and did a workout DVD every day in January. Now back to a size 10 (we'll not mention the wee muffin top I get jeans), and feeling much better for it.