When I was in junior high, I once snorted pepper to appear sick in front of my mom, so I could stay home that day. It wasn't much, just enough to get to sneezin. Not particularly fun but it went away in a half-hour, and I stayed home from school.
Years later I snorted caffeine pills to see if it was more intense than popping them. Minimal effects, if any. It's not extremely harsh, but not pleasant at all. Some years after that I got a 20-sack of "coke" from this guy I hardly knew. I remember his name now, it was Moped Timmy. He was like in his 30's and rode around showing off his piece of shit moped. Anyway this was the first time for me doing coke. I tried a line and it felt just like caffeine did...shitty. I did another line in case it was a fluke, but it wasn't. I threw the rest away. I'm just glad I started small instead of getting an 8-ball of caffeine. He could probably have used the $20 to fix his broken moped anyway. Never seen the dude since...
I don't recall, but I may have snorted vicodin once. If I did, it was offered to me for free . I know I didn't snort any vicodin that I paid for.
I also snorted some methadone to see if it would hit faster. Maybe, but the burn + the fillers isn't worth it.