I've gone through this many times.
I was a Glock guy, and came into a Springfield GI 1911 in trade for my extra washer/dryer. Excellent gun and I got the 1911 bug. Love them. I now own several including a TRP and a Colt 1917 made in 1918, both of which shoot like dreams. Have several others, in various brands, sizes, and flavors.
I didn't like Sigs when I first tried them. Then I got a screaming deal on a P220 in excellent condition, and was an immediate fan. I have P226, P220, P6, P225, P229... love them!
I was not an AK47 fan when I first shot one. I didn't care for the ergos or the sights... then I learned more and became more educated and appreciated what it has to offer. Now the AK47 is on my short list of favorite platforms, and one of my primary HD guns, and I have them in many brands and flavors and in 7.62 and 5.45.
I never liked the looks of the FAL, but got a screaming deal on a DSA model. After learning about it and shooting it, it's my favorite, or second only to the M1A, .308 platform.
I discovered the SW gen 3 series pistols reluctantly and by accident, and now have started buying these up wherever I can find them!
Taurus PT-145. Taurus burned me on a semi-auto once (PT 140) and I swore I'd never buy the PT line again... but they just got the PT 145 right. I really like it and it's often my jogging fannypack gun. 11 rounds of .45 ACP in that package and it just works.
These guns sure are addicting!
Conversely, guns I really wanted to work but didn't:
CZ 85 broke on my 2nd shot.
I never fell in love with the Beretta 92FS despite my wanting to love that gun. My first handgun and my duty sidearm in Iraq, but I never fell in love with it.
Browning Hi Power - never did it for me.
Taurus PT140 - had so many problems I just gave up.
Keltec P3AT. Unreliable and painful as sin to shoot. Rarely carry or use it... despite it's handy size.