For most of my designs - I place a high priority on how easy the part vendors are. Mostly, I design based on what is available from the usual big distributors like DigiKey, Mouser, Arrow, etc. That allows me to quickly order sample qty's and work through prototype builds and testing as well as small volume pilot runs.
There are some vendors like Coilcraft that generally sell direct, but are VERY easy to deal with so I don't care.
Maxim Integrated, on the other hand, is a major pain. They hide pricing, make sample orders and small production orders an ordeal, they require NDA's for data sheets! WTF?
I was looking at a new product that is a USB charger/emulator (very common non-exotic part) - but I found myself running away since I have no idea how much it costs and have to submit an NDA just to get a data sheet. Even if I did all of that, I end up with a part in my design that is a problem for purchasing.
Who is willing to put up with this?