Yes, it is a burden when I am trying to fix a cup of coffee and he's standing there holding my leg making it difficult to walk from the counter to the sink, but the joyous expression he gets when I instead bend down on my knees and tickle him or blow on his stomach is pure happiness worth all the work we've put in so far :)
Then at four months she teething started early and she couldn't even sooth herself by biting toys, so it was a real burden for everyone.
It was only after that period that things really started to look better, with her interacting more and developing a more visible personality.
I heard somewhere that babies should actually spend three more months in gestation, but can't since we started to walk upright and now have a narrower birth canal. I think it's a very elucidative theory, because in that period I really don't think that babies are ready to face the world.