I empathize with you. I collected from the late 70's to 80's upon which they took up permanent residence in my bedroom closet where I grew up until I moved them to the basement of the house I bought. 2 years ago I was home for a bit and started to think about with I was going to do with them after all this time. Like you, my kids had no interest in them and I was thinking about the need to eventually downsize since I was in my mid 50's. So I started the whole education process (CGC, these forums, Ebay etc). Time is still much on my side so I am in no rush, but I have found the entire process to be very enjoyable from participating on these boards to dealing with buyers on Ebay. Maybe not regaining passion like others have mentioned here but it has brought back some of the joy I experienced back then.
Good Luck & I echo the last sentiment Mmehdy said.