What is the most FUN pair of speakers you've ever had and why?

Paragon Acoustic Regent

Read about them when they first came out but no dealers in my area. Years later and very early in my days here I came across a pair in Connecticut several years after Paragon closed shop. Drove 10 hours round trip to pick them up. Of the more than 50 pairs of speakers I’ve had through here the Regents are the ones I miss the most. I logged more listening hours in succession with the Regents than any others. They made incredible music at all times and never fatigued me in the least no matter what front end I put together. Fun, musical, expressive, engaging....so many boxes checked who could ask for more. (This dummy)
Most stupid sale I feel I ever made. They are so rare and incredibly musical that to this day I can’t believe I let them go. Guess the merry-go-round made me think that there was so much more to experience.....

there’s a pic of them in my Evolution in progress system.  

I wonder if these speakers were more about being at the right place at the right time.  I also wonder if they’d still fulfill today, or if everyones expectations have continued to go up and up.  If they would still be “the most fun” why have something else?  It’s like saying “those $100 cerwin vegas were amazing; I wish these $7000 personas brought me as much joy”

for me the JBL 4333A... everything sounds very pleasant with great bass and smooth... I just keep looking what to play next!

b&w c210. I call them little Bees and they're still playing in the lab room where I hobby. 
I picked them up at good will $10/pair.

Most fun? Pioneer HPM-100's, back in the day. Everything was fun then.