Super Takumar 85mm f/1.9 is built very well and does it's thing quite well.
SMC Tak 300/4 is a tank and fringes in high contrast situations, but is sharp.
SMC Tak 35/3.5 is tiny and has great IQ
Super Tak 55/1.8 is light, cheap, best sharpness (even on macro tubes past 1:1) of anything I own
Super Tak 50/1.4 is quite good (especially after UV bath) but is 1/3 to 1/2 stop slower than modern glass
Super Tak 200/4 is forgettable
Super/SMC/Auto Tak 135/3.5 is forgettable/reliably good
SMC Tak 28/3.5 is forgettable

Off-Brands:
Vivitar 28/2.5 is great value (especially the close focus versions) but low contrast
Vivitar 135/2.8 is good and cheap, colors were good
Fuji 55/1.8 is great IQ but funky colors in skin tones

tldr: Experiment, copy variation is prevalent, and trying new stuff is half the fun of the old glass.