Hardly ever, because I suck at video games and have no time or willpower and most of the time would rather have them easier than harder.
I tried a nuzlocke of something or other once and a no-reset FE run once, and sometimes I will decided "screw what makes sense this is how *I* wanna build my guy" but that's about it.
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STEAL, LEAD, STEAL! PHANTOM KIRBY NICENESS!
Dr, lead, Football!