There are plenty of amazing players who use 3-2, so you're not making a mistake by choosing that fingering.
But I feel like the modern trend nowadays is 4-3, which is also what I teach my students and use myself. For one, I personally feel that it makes playing an alternate bass pattern easier, since you've got one finger assigned to each of the three buttons (bass, chord, alt-bass). After all, if you had to play something like a C major arpeggio back and forth in the
right hand (C-E-G-E-C-E-G-E...) you probably wouldn't use a fingering of 2-1-2-1-2-1-2, etc., even though that would get the job done. No, you'd take advantage of the fact that you have more than two fingers!
So why not do the same in the left hand?
Second, I've always suspected (but can't prove) that the fingering was used in the old days because most beginners were young children without any prior experience playing an instrument. It makes a certain amount of sense in that case, I suppose, to avoid the "weaker" fingers. But for an adult these days who, at the very least, has been typing on a computer keyboard for decades, there's little reason not to use the full complement of fingers (and yes, that includes the 5th finger when playing scales... but that's a post for another time).
Now you will have to eventually switch it up to 4-2 when playing minor and dom7 chord patterns, which some have cited as a point in favor of 3-2. This is really not that big of a deal at all though--something my students get used to fairly quickly and then don't even think about afterward.
In the end, as
@Dingo40 said, you're eventually going to want to be able to use any finger anywhere it's needed.