I'm with you OP. I was going to flat iron my entire head at goal length but now I just don't desire to see my hair straight anymore. I'm on a no heat challenge for the entire year and I'm probably going to give up heat completely.
For me the process of using heat (i.e. blowdryers/flatirons) on my very kinky and fine strand hair feels too much like forcing it to do something that it just doesn't want to do. The amount of time it takes, the reversion right away, the potential for some breakage, and the dryness that happens with hair just makes it not worth it to me.