Methadone is WAY more recreational. I haven't had it many times, but when I have, it's been honestly amazing, probably my favorite opioid overall (I have never IVed). 60mg had me nodding harder than any nods I've ever had, felt amazing for almost 2 days.
Bupe is recreational if you aren't used to full agonists. When I was on kratom, 2mg of bupe made me feel really nice. Now that I'm on bupe... it just makes me feel normal. Mostly normal, except for the low testosterone.
I do like bupe for how functional it is, though. I am very motivated for work. I like how I just feel normal on it, and I don't think about other opiates really at all. And even when I do, I wouldn't be able to feel them, so I have no choice but to ignore them. But really, I haven't had a "real" opiate craving in quite some time.
I do wish I was completely free again, though. I definitely felt the best I ever had when I had my 5 years clean. I did an ibogaine flood dose and it changed everything for me.