GA, I've been reloading for 45 years and I also started with the .38 Special. Back in those days Bullseye and Unique were the standard choices for .38 Spl.
I still like Bullseye for 148 grain wadcutters, but I've also used WW-231 and it works very well.
A few months ago, like you, I discovered CFE Pistol. Right now it's my favorite for medium power .38s as well as a number of other cartridges. It meters well and burns clean. But go ahead and try other powders, we all do it and it's part of the fun of reloading. Just stay safe and stick to those loads published in reputable reloading manuals.
Duh, so HP-38 and W231 are the same? I've used both, but didn't realize that! Oh well, you're never too old to learn something, especially if you listen to a great group of folks like those on this forum. Thanks guys!