It's very common of the opinion you're hearing here.
Folks that have always owned Palm platforms are certain that Palm is the best. People whose primary portable device is a telephone then they will trt to convince you that a smartphone would be the best.
Someone that has a hard-on about Palm or Microsoft will try to convince you that anything is better than Palm or Pocket PC -- like Linux or Zaurus (still their own OS, right?) or uhh ... I can't remember the other.
Personally, I've owned every Newton that ever was made, almost all of the Palms, a Rex (remember that?) and currently I have an iPAQ, with vga, wifi, bluetooth, CF, and SD.
The device that was the best to me was the last generation of Newtons. That was a fine device.
The most stable and easy to use is definitely Palm. In my opinion the reason it is so stable is because it is a jumped up organizer. If that's what you're interested in -- a place to save your contacts and appointments -- Palm is the best. It never loses any data and there are very well crafted appointment and contact replacements.
The Pocket PCs are not very stable. They are rebooted often as many as a few times a day, and not very times do they make it longer than a couple of days without booting. The 3rd party appointment programs, for instance, are jokes, making their "upgrades" to the built in appointments are simply ways to change the color schemes, or maybe move things around on the screen.
Some folks like the smartphones -- but people like me who never use a cell phone the screen is far, far too small. If you live out of your cell phone having a smartphone can add some useful additions.
Personally, I don't use a phone and I'm far interested in the idea of having a real (small) computer in my pocket. In that case, the Windows 2003 Second Edition on a VGA screen is very nice. I have the iPAQ hx4700 and after four or five months (first Pocket PC) I'm beginning to make my hx4700 useful. The Pocket PC is much more closer to a Newton than it is to a Palm, though.
If your most important thing is to carry around your personal information, Palm is very nice. In many ways it is like a Mac -- you know, you don't have to learn very much to use the Palm, it isn't very exciting functions, but then again, it just keeps on working.
The idea that someone can say either Pocket PC or Palm is better is not possible. That's like trying to decide whether a dirt bike or a Harley is better. They 're both different.
P.S. I love having 2 GB of mp3's in my SD slot, played in a very high definition 2-channel playing in my hx4700...