On one hand, yes, because they can so effortlessly put on these cute outfits and dye/style their hair in many cases, but on the other hand, no, because I imagine I would be too lazy to fight or rather just not cut out for it.

Though, if we include something like Milky Holmes in the mix... I could probably be a Milky Holmes style magical girl. Without their magical powers they are absolutely incompetent, completely worthless idiots. But with them, they suddenly (magically?!) become smart, good fighters. So maybe if my mahou shoujoness worked that way, I would be both insanely cute AND insanely powerful once I transformed.

So yes, as long as transforming = motivation to fight + skill