I like an open mouth CIM/COF combination. I find that a lot of ladies prefer the CIM if they are wearing make up. Some will opt for the COF over the CIM if they are cum haters. I can go either way and do often. Sometimes if I'm going msog I'll CIM first pop and COF second pop, but sometimes the second pop doesn't happen.
I appreciate a girl that offers either finishes, or both!