What CRM features do you use most? Which additional features you wish were available?

There are many CRM options ranging from free to premium, from saas to standalone packages. Some of the most complete ones are quite pricy. However, there are a new generation of CRM apps that are starting to use AI technology. I am in process to do research in this area to find out what are the needs people have that the old ones don’t provide. I am planning to create an app which I will launch free to use to gather feedback from the users. This is my first attempt to gather ideas from you in this smart collective of like minds.