Girlfriend Experience
That would definitely be a good GFE, although most punters would also probably french kissing and DATY.
Pretty much my thoughts. There needs to be a bit of chemistry between provider and client, and sometimes a provider and client just don't click, even when both give it their best go. It helps me feel more comfortable making an initial inquiry when the ad gives a little more detail on what they offer in their service (e.g. kissing, oral both ways, etc.), rather than just putting "full service" or "GFE". Maybe this is from some less than pleasant responses I've had to what I thought were reasonable queries. I got told off by one WG for asking if she offered kissing? I didn't even ask for french kissing, just kissing, and in response I got lectured as if I had asked for oral without protection.
For me it's never about what sex acts are involved, but more about the vibe! Being more playful and affectionate and letting your personality show through. Personally I also find it a real turn off when providers put on an extremely cutesy and submissive persona for GFE bookings, I prefer a girlfriend that is a little spicier I guess!