Alright, this isn't what most people think, but it's my experience, so...
I have a high tolerance to opiods being a heroin addict. I got on Suboxone for the second time about 3 months ago (have been clean since except for 2 isolated incidents). I'm a lucky one, for some reason, as not matter how much dope I use, I rarely experience wds that put me out of commission for longer than 4 hours or so. I don't use the subs everyday, either, at this point, only when I have a bad craving. Since I have a nasal-fixation, I wanted to see what it would do insufflated eventhough I read a lot of people saying it doesn't do anything.
I almost always get a nice buzz this way. It's not always intense, but it's nice. It starts with me getting really energized and talkative after like 15-30 minutes (like the OP said), and then after one to two hours, I feel really chill, experience a slight nod, and have a general sense of euphoria. I don't do this everyday, like I said, mainly cause I still find it tedious to snort the massive amounts of nasty "lemon-lime" flavored power the tablets leave, but also because I know I wouldn't feel the good feelings if I did it everyday.
Oh, and I usually dose either by insufflating 2 mg and then taking 6 mg sublingually or I just snort 4-6 mg.