I been usin Red Hat for most of the time I've spent in linux. I have Slack installed now too, and am poking arond with it.
I like Red Hat. As my first exposure to linux it has been a great place to learn. All around it has been easy to learn and very efficent it it's operation.
I've used suse a bit, it seems to be about the same (as I'm sure most linux is).
I'm looking forward to getting ionto slackware though. Of all linux it is supposed to be the most unix like, or is that bsd like?