1. They're generally really corny. Porn is far more rewarding and much easier to access
2. Make it about more than just romance; for example, there's a number of series of books available through Prime Reading on Kindle devices that are "romance thrillers" and I've read a couple. They're about detectives/FBI agents solving murders and also happen to get frisky while doing so.
3. I'm not opposed to them, but generally they seem to be extremely vapid and shallow--and most of that is based on the cover artwork that all resemble some damsel in distress looking on as some Fabio-looking meathead is somewhere in the picture. Some strong character development to go along with well-written fucking would be fine with me.