Really belongs in drug culture, so many threads about this but I will contribute. From the durgs I have tired.
1.oxycodone- this drug delivers the most euphoric high. ALMOST to euphoric.
2. Speed/methamphetamine- this gives the clearest high. Not the most euphoric, but the clear head high is amazing. I'd take this over weaker opiates any day
3.gabapentin- I have bad socail anxiety and when i finally took Gabapentin I felt amazing relief. I was finally me. It obviously isn't the Most euphoric drug. But it has helped me the most out of any drug I have used