I've never had any good feelings from benzos either. Valium didn't do anything at all. I blacked out on temazepam (if it made me feel good I don't remember it), and while Xanax was brilliant for cutting short panic attacks it didn't make me feel floaty or any of the other things benzo lovers talk about. Even when I've had IV sedation with benzos, I haven't had that feeling others talk about.
Not sure if there's a connection, but narcotic painkillers don't make me feel good either. At best they do relieve the pain, at worst they just make me feel stupid and groggy without relieving the pain.
Just goes to show how true it is that different drugs have different effects on different people - that's just as true for recreational use as it is for therapeutic use.