Sniffed all kinds in my time, SHUT IT COMLPAINING ON 2C's they do hurt a bit but try hoovering Ethylphenadate crystal EVERYDAY - what scares me is my tolerence is up so lynns aren't lil' 20-30 more like 70-100 (mg) probably snorted 28g due to daily addiction since '03/2012.
Actually in answer all kinds can change what makes a guy snort a line, turn into a fox and wear leather, flip a nickle and chew on a toothpick and what else can make that same guy hug the bed screaming I WANT MY TEDDY BEAR FROM WHEN I WAS 5 THE PAIN *cries*
how crushed it is
the type of chem crystal, floury
the desire to take the drug (ie, someone add'/dep would feel less pain as they just want it up there)
the amouunt of pain relief (after bangin' le' heroinz snorting eth is less painful, also let's)
Redosin' n dopamine (dopamine kills pain)
impurities and cutting agents
Another thing that might help you out is to snort it pure, cut it down first (I know this breaks the rules a tad) but sometimes doing heroin I might snort it at first but often doing eth I'll make an eth line and mix 3:1 or summit then bosh it around and it's one line of both but you still feel some burn.
Some stuff don't burn like methylone but flour like it feel odd. Heroin too brown #3 feels abit sot n annoying.