Right now, my "active" magazine supply is made up of several of each of the following:
Chip McCormick Power Mags (8-rd)
Chip McCormick Shooting Star (7-rd and 8-rd)
Wilson 47 series (7-rd and 8-rd)
Metalform-made/Colt-marked (8-rd)
I would say those are my favorites.
I also have a couple each of:
Mec-Gar (8 rd)
Act/Novak/S&W (8-rd)
All are at least OK for range use and function fine as far as feeding bullets into the chamber goes. That may sound silly, but there are a couple other little details or minor problems show up when using SOME of them in SOME guns although they feed fine.
Two examples:
1) The Wilson 8-rd mags will sometimes fail to lock open one Springfield Armory pistol when empty (Wilson 7-rd mags work fine); and
2) two of the Metalform/Colt mags will sometimes fail to lock open my S&W Gunsite, and some of the Shooting Stars are a snug fit in the same gun and don't always drop out when released.
That shows me that it's an absolute that each individual magazine has to be tested in each individual gun.
I use all of them for practice, but carry only the Power Mags as spares. I do use a proven Metalform in the gun for it's flat baseplate. The Power Mags work fine in every 1911 I have, and they have a very smooth and rounded baseplate, which is comfortable for carry in the mag pouch. I'd have to say they were my favorite.
I would, however, buy more of any from the first group I listed if they were cheaper. I would just have to be careful not to carry them with certain guns, so it's simpler for me to keep buying the Power Mags.
But that's how it's been for me.