I carry my 26 everywhere, usually (daily) with 20 in the magazine and one in the spout.
I put an extended ported barrel on it, an internal laser and Advantage Tactical sights.
I use Pearce +3 magazine base plates which give a little finger grip and add 3 rounds to capacity
Glock 17 mag, +3 base plate + 17->26 mag "spacer"
If I'm in a swimsuit, I only carry the 13 round mag (10+3 base plate)
Sometimes the 15 round Glock 19 mag with a 19->26 spacer
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I also own a 19, but the 26 is better for carrying, more adaptable, you want a longer barrel like a 19? I added an extended barrel, but the fat slide is still shorter than the 19 so I can sit down easier.
not enough grip on a 26? use a 17 or 20 round (17+3 with PG-39 base plate) mag and a mag spacer or a Glock 19 mag and a spacer
or a Glock 26 -10 round mag and replace the baseplate with a Pearce PG-39 base plate so you have a 13 round mag and a pinky finger rest (this is great for ultra-concealment)