Do women enjoy it when their leg(s) are gently rubbed by their partner?

You'd have to ask her.

We're not her. Women are individual beings. We're not all the same.

Dude, just try it. Especially if you two are together... You should know this already.

It's not like it's some kinky stuff. Most women I've been with like it, but not all do. It's a preference.

You can either try the direct approach and see if she likes it, or ask her if you're so worried.

Here's an odd idea: ask her.

Try out your theory on strange women in check out lines.

Not everything needs to be some secret, covert, mission. Instead of bumbling around trying to find the secret formula, ASK HER WHAT SHE LIKES.

Physical affection is appreciated by most. Rubbing a woman's legs, naked, is different than rubbing her legs, say with jeans on.
Some women have 'ticklish' legs, while some my want to shave their legs, first.
All depends on the woman, situation, mood, etc.
Do NOT rub her legs, if she has a sun-burn, or poison ivy, or a rash, burn, or injury.... no brainer - right?

Of course she'll love it.

since when did stuff this soft core become a question of appropriate or not? This is somewhere between first and second base.

i mean, ask her and see lol. i personally find it to be a huge turn on

Full body massages is where it's at. But it's not just limited to females.

Most likely she will but I would ask first just in case.