Me! I'm transitioning now...It's been one year since my last relaxer. I flat iron my hair 1-2X per month, alternating wearing buns.
I make sure my hair is loaded with heat protectant and I deep condition and baby my hair, and I have had no problems. My curl pattern has not changed and I have had little to no breakage.
I disagree that you should stay relaxed if you want to wear your hair straight. Some people just don't want to deal with chemicals anymore, but still like the straight look. Pinkskates and WhipEffectz are two natural ladies with healthy hair that they wear straight most of the time.
I say go for it!
Don't get caught up in labels and whatnot...everyone will have an opinion about what you do with your hair, but the only thing that matters is that you are happy with it!