[This will be a tad long, sorry...]
I tend to always try on any mask that I come across whether in a shop or from other divers. Actually, not that many masks suit me as I am "too pronounced" on the t-section of my upper nose and the bridge between my eyes. With very little compression, a lot of masks will put pressure on this area which can be painful and give me headaches.
That said, I have collected about 5-6 freediving masks by now. But I only really use two of them these days.
The one mask I have highly recommended lately, though it is expensive and can be hard to find, is the SubGear Steel Comp. At least, that's what I think it is called. Very low volume, too, but it is special in that the glass lenses can actually move and bend inwards a bit. Think of it as a mix of the very flexible Sphera (which is my second most used mask) and a classic freedive mask. For deep spearing or people with EQ issues, I highly recommend the SubGear mask as it takes very little air to EQ the mask.
If it fits you, certainly give it a try. (There is one with a frameless one-piece glass lens with almost the same name. That's not the one you want. You want the one with two glasses for the most compressible mask.)
I use the SubGear mask for shooting pics and video on scuba and for spearing and fun diving on freediving. Actually, I use it for pretty much everything except for deeper non-shooting freediving where I still use my Aqualung Sphera. That mask needs even less air to EQ since it more or less just collapses on your face at depth instead of sucking your eyeballs out. I am EQ challenged so I can actually tell a difference in terms of which mask I dive with.
The third mask I use, though not that much these days, is an old Omer Abyss for two reasons. It is the only mask I could find that fits me with a bridge between the lenses with enough material in it to drill a hole for a GoPro mount. So, basically I only use that mask if I want a camera mounted on my head.
My first love in masks was a Cressi Super Occhio Plus. It fit me well but I later donated it to this amazing woman who needed it way more than me (I got a replacement but the SubGear has taken its place):
One of the masks that I really, really wanted to work for me is the great looking, super low volume Zero3 from Omer. But... they should have called it 'The Zero to 3%' or something similar to signal the percentage of divers it actually fits. Because of its ultra low volume it has a very shallow skirt but it's also is a very stiff mask, so it doesn't really adjust to your face well. Most of the people I know who have tried that mask can not get a seal on it at all.
I am guilty of buying one online based on its looks and specs but ever since then I have basically tried giving it to friends. No luck, yet.
I have learned two things from this. First of all, don't buy masks without trying them first (duh). Second, the Italian face model dude who stuck his face in some molten aluminum when they were making the mask mold, must have a pretty unique face...