I tried every different nipple for Dr. Browns & Avent with my 3, but it wasn't the bottles themselves, it was the process of getting them used to the idea of bottles.
- My first hated them, but my husband gave him one every evening starting at 6 weeks and they finally got the hang of it around 12 weeks.
- I started with my second at 15 weeks, right before he started daycare, and he figured it out AT daycare - he had to if he wanted to eat.
- I quit work when my 3rd came. We tried bottles on and off, but she never took to them.
My experience has been that babies prefer breastfeeding, but with consistency they'll eventually begin to bottle feed.
You may find that your baby will wait for you to come home and have a huge meal. You may also find him starting to sleep through the night (my daughter started sleeping from 11-5 at just a few weeks old!)
Good luck - it's a long process.