I love my Brother PC-420. It's sooo easy to use, and the thread cutter and needle threader are both awesome.
I inherited my Granny's Pfaff 7550, and used it a little, but just couldn't seem to "bond" with it. It's now sitting in the closet, along with the Featherweight I bought, which is really cute, but again, I couldn't seem to "bond" with it. I really ought to just sell them, but Granny's machine has sentimental value, so I'd have a hard time parting with it. She loved that machine, and was so proud when she bought it.