Pacifiers can be a tricky thing, because some babies hate them and some love them.
Our son absolutely loves the Wubbanubb that's the puppy with a green soothie pacifier connected to it. I bought it for him on Amazon before he was born, so I had it for him. I took our kids pacifiers away at 7 months old, but they didn't use it very often really so it wasn't a big deal.
He loves to have something to suck on all the time, and if he's already eaten then it's a pacifier. The pacifiers that he likes are soothie pacifiers - the one that is a Wubbanubb and a vanilla scented one, as well as MAM Baby ones, and Tommee Tippee ones that are for 0 - 6 months.
Some people say that babies can have nipple confusion if they breastfeed and you offer a pacifier, but that's not the case for our son. He nurses all day, has a night bottle of my milk, and uses a pacifier as he wants to. I think that the soothie pacifiers that are vanilla scented help calm or comfort baby. I'm not sure if it tastes like vanilla or not, but he sure enjoys it.