When I first got into knives, I bought combo edges thinking that having both types of edges available would be handy. It didn't turn out that way. I now use just plain edges, and they are easier to sharpen.
A friend who is a girl (not a girl friend) liked my fully serrated Jot Singh Kalsa. I didn't care for the edge, and just handed it to her. Her mom owned an apartment building, and the coarse edge helped her with many jobs. She loved it.
I did find a good use, wet rope. If I ever bought a boat or went on a long trip aboard one, I would buy a Myerchin, either fully serrated or a combo. However, once on dry land, I would revert to the LCC.