I tend to mostly make sushi rice and long-grain white rice like basmati or ... that can sense how your rice is cooking and adjust the time and temperature to get a perfect result.
All should at least be able to cook white, basmati and brown/wholegrain rice ... but you'll need to be able to program it to cook for a set time. If you can't, your rice cooker won't be smart enough ...
A good rice cooker will often do it faster than cooking it yourself and make it fluffy, separate and sumptuous every time. What's even better is that many rice cookers now also work as food ...