It's odd, when I used Adderall in my late teen's, I found it very, very euphoric. 30mg would have me feeling fantastic and I would stay up for days chasing the high. Typical amphetamine addiction cycle.
I'm now in my early 30's and prescribed 35mg Adderall XR per day. I haven't found it all all euphoric since being prescribed. I expected the first couple of weeks to be kick ass, but not at all. There is a mood lift sometimes, and it helps me focus; other than that it's pretty ehhh. It definitely helps my ADHD symptoms, but it sucks as a recreational drug for me personally, and I've tried. I did have a heavy period of pyrovalerone use from ages 17 - 20 and methamphetamine (around 1g per day at my peak) from ages 19 - 25; so I'm sure that I've lowered the density of dopamine receptors in my brain by quite a bit, hence my lowered response, I eventually would like to get up to 60mg Adderall per day as that seems to be my optimal dose to manage symptoms while still allowing me to eat and sleep.