Love a good bit of poppers action! Very pleasant to take a hit while being sucked off. I also rather enjoy them in more extreme sessions - having them administered through a facemask while restrained is most entertaining, especially if anal play is involved. Back in some of my earliest experiences, the best I can describe is making me feel incredibly "slutty", if that makes any sense.
Like others say, it's hard to get the good stuff which was much more available in the older days.
Forget going for certain brands - poppers appear to be the most pirated products around. Most important is to find the right supplier, and then hope that they don't change back to Isopropyl Nitrite from the good Isobutyl Nitrate. Unfortunately, other than experience and personal recommendation, it's a complete crap shoot what you end up buying.