I know there's many fans of the growth genre. Fans have different reasons to like girls growing in muscle size (and height). Some of them like the contrast with how it was before. Others like the role reversal element: once a girl grows muscles, she can start bossing around her boyfriend (or anyone around her).
The main difference in tastes among growth fans, however, seems to concern the rate of growth. Either female muscle growth is very gradual, or it is very sudden. When female muscle growth is gradual, it is the result of natural means: hard work with the weights. When it's more sudden, the cause is unnatural: it can be a magic potion or a some kind of growth formula. Female Muscle Growth Story
In the ever growing collection of comics on Amazonias, there's different kind of female muscle growth comics.
Of all the female bodybuilders in the world, maybe Maria Wattel, born and bred in the Netherlands, is my personal favorite. She ticks all the boxes I love being ticked: huge muscles, very tall, beautiful and dominant.
I've actually met Maria personally and I can tell you that while many female bodybuilders are smaller in real life than they look in the pictures, this is not the case for Maria Wattel. Indeed, here's a woman to whom pictures - as good as she looks in them - don't do justice.
One other thing images of her can't really show is how strong she is. She was more or less able to do anything with me, but what I most remember is her walking towards me and, in one smooth movement, putting her hands under my armpits and lifting me, sticking me against the wall with my head above hers.