hands-down favorites are the IDEA conventions. I love to expose myself to many different ideas and take off from there if I feel it is a good fit (that’s where I was first introduced to MELT). I remember more than one conference where I felt that just one class alone was worth the entire expense.
This year, I also added a few NASM specialty certifications which are really just continuing education with a title at the end. I like those as well because they go into great depth and provide wonderful material.