I work as a sysadmin in a web hosting company and few people do drugs, some you can tell they do but will never admit it, only one or two guys I can really talk about the topic and they are interested and tried lot of things, but for some reason they really fear talking about it. Although it was fun when this guy I randomly talked about pills, alcohol and that, came to my office to me begging for some uppers, I had Modafinil and remember giving him 200mg and the guy was hyped and happy all the day after that.
Myself, I somewhat fear what I can might do stoned or nodding at work with those terminal to heavy traffic servers; but being a sysadmin/netadmin @ uppers ( Adderall, Modafinil, lots of Coffee and whatever else) rocks, you are a monitoring, programming, wiring things, replying lots of mails, changing to monitor B, then loading virtual machine C, while doing that tape backup on the datacenter. You become a non stop netmachine, it's awesome.
But the crash it's one of the worse, you better stock on some Alprazolam, Carisoprodol, Diphenhydramine, Gabapentin, etc. if you don't want your head to explode.