I don't mean to sound cavalier about this, but the reason that I like them is that they sound good. Unlike a lot of folks here on the forum, I haven't tried a lot of other brands other than having been an EB player previously. However, gauge makes a big difference. 11s would probably sound better but I like the feel of the 10s.
You very likely already know this, but just in case, running the piezo output through an electric->acoustic IR will get it not too far away from a true acoustic sound. Using that alone or blending that with the electric output gives you that wide tonal palette.
I avoided D'Addario strings for the longest time because it seemed like that's what
everybody used. (I'm weird that way.) Then I finally tried them, and realized there was
a reason everybody played them. They sound good, they feel good, and they're really consistent.
I played GHS Boomers for the longest time and really liked them, but they started getting inconsistent for me. I've tried Dean Markley (meh), Ernie Ball (absolutely awful tone and feel, never again!) and Elixir nanowebs (love them, but they're expensive).
I started on 9-42 gauge strings but gradually tried some different stuff over the years. I've tried strings as high as 11 or 12 gauge in standard tuning, and really found there to be diminishing returns on tone with super-heavy strings. Unless you have a REALLY heavy picking hand, I just found there was way too much tension that killed my tone (and my fingers). For lower tunings, absolutely. But 9s or 10s are the sweet spot for me in standard tuning.
I've been on 10 gauge strings for a while, but may go back to 9s, or possibly even try 8s.
In the immortal words of Billy Gibbons...
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