I've always gone for best performance per dollar. So if Intel competes in that arena I will be there. I don't hold a brand alliance.
Same here. No allegiance to brand.
I've switched back and forth a lot.
My main desktop has gone something like this (from memory without looking anything up)
1991 - Intel 286
1993 - Intel 486 sx 25
1995 - Pentium 120
1995 - Intel Pentium 150
2000 - AMD Duron 650
2000 - AMD Athlon 1200C
2001 - AMD Athlon XP 1800+
2002 - AMD Athlon XP 2000+
2003 - AMD Athlon 64 3000+
2009 - Intel Core i7-920
2011 - AMD Phenom II 1090T
2011 - Intel Core i7-3930K
2019 - AMD Threadripper 3960x
The kiddo and better half's builds have all mainly been AMD:
Kiddo: FX-8350 -> Ryzen 5 1600x -> Ryzen 7 3800xt -> Ryzen 7 5800x3d
Better Half: Ryzen 5 2400G -> Ryzen 7 5800x3d
I've put a variety of AMD APU's and Intel Celerons in my HTPC builds, before moving to ARM (Hardkernel ODroid N2+) for those.
My server history is something like: (again, quickly from memory)
2011 - AMD FX 8120
2014 - AMD FX-8350
2014 - Dual Socket Intel Xeon L5640
2019 - Dual Socket Intel Xeon E5-2620 v2
2019 - Dual Socket Intel Xeon E5-2650 v2
2023 - AMD EPYC 7543
First selection criteria is "what does what I need it to do best, within my budget and/or best price". As a tie-breaker - however - I tend to spend money with the underdog to benefit and keep the market healthy in my own tiny little (mostly insignificant) way.
For 25 years that has mostly meant AMD, but maybe that is no longer the case.