it definitely is a matter of preference and personality. As a long time heroin user, i have the opposite perspective. I find the IV meth high to be WAY overwhelming and the initial rush to be downright scary. When using stimulants I prefer to be by myself as i feel way out my element, like im acting obviously cracked the fuck out and everyone can tell. I have a strange relationship with stimulants. I enjoy the high but i can never seem to relax, feeling great but paranoid, and satisfied with the high for mere minutes before i have to re-dose. A lot of people like to use them socially but that has never been an option for me, as i fiend way too hard and feel like my personality at that point would be way off-putting to anyone else around. When I use meth or coke, I literally just sit by myself, re-dosing and re-dosing and re-dosing. Subsequently, i rarely use them anymore.
Now Heroin... ahhhh, heroin. I milk that initial rush for all it's worth, preferring to be alone only during this phase so i can lean back and drift without interruption. Once i snap out of that initial nod i simply feel content and comfortable, capable of interacting with the world with a smile on my face. It's a subtle electric buzz. I've got my dosage dialed in to where i'm not nodding off uncontrollably and drooling all over the place, but if i have a cigarette and close my eyes i can definitely drift into that waking dream state. I'm pleasant to be around, intellectually capable, cruising along simply enjoying what my environment has to offer. I don't mind the subtlety and find it much more manageable. Until, ya know, i don't have anymore. Then i have to start coping with the fact that I'm an addict. Bummer...