I actually think it's a good thing that life changes, sometimes dramatically. It's normal. I feel entrusted to ensure that my children are raised in a way that makes them aware of respecting the rest of the family, but to do that means that I have had to sacrifice some things as well. It isn't all about me or my husband, it is about the family as a whole.
Not going out when baby has a sleep has been mentioned. The rest of the household suffers when a baby doesn't have enough sleep. A good sleep during the day is an excellent mood improver for everyone. I think that goes for every household, not just mine. If you can't let your baby have her daytime nap because you want to catch up for coffee with your friends (or whatever it might be) I think you are asking for difficult times ahead. A 20 minute nap in the car does not count. It isn't until a child is a little older (perhaps kindergarten age) that it becomes apparent which kids are better able to fit in with others - oftentimes the ones who have behaviour issues are the ones who've been allowed to "set their own routine" or who've been dragged here there and everywhere (to fit in with their parents).
Just my opinion and based on my experience. I think parenting is a full time job and if you think that letting a child tag along for the ride is parenting, it's not, it's either a case of being uneducated/inexperienced or lazy.