>>7165653To preface this, I'm going to point out that I pretty much only watch female chuubas... and occasionally Tomari Mari.
Don't care about GFE.
Usually even if initially a chuuba seems pretty entertaining, eventually the often too common displays of GFE put me off from her and lower my personal score of her. Easiest example of that for me probably being Rushia. She'd be pretty fun if she just pulled away from that cringe a bit more.
Other than that, I don't really know what to say really other than that most of my favorites fill on of two main roles:
1. A friend who you mostly could casually banter with just like you could with a regular male friend.
2. A daughter-like existence. A great target worth teasing, but most importantly, someone who makes you want to protect her until she (mentally?) grows up and finds stability in life. Just a slight exaggeration.
For reference, these are the girls I most often tend to watch as a result of that 'role fulfillment':
Pekora, Marine, Botan, Shion (come back already, please), Luna, sometimes Miko.