I'm not a big fan of samples, they are very hard to get right but I think a lot of pie people have managed it. Some tracks have great samples, Genetic - Trancemission springs to mind as does Kaaya - Circular Sanctuary and Pleiadians - Moon In Your Window. Those samples really helped the tracks, fit well with the music and were not the focal point of the whole fucking track, nor were they repeated over and over again.
Samples I hate are Nystagmus (ALL) as they are the focal point of the music, go on far to long and stand out too much, for me.
Shitty drug samples, when done well drug samples can be done but most just sound like 13 year olds just discovering unsealed pills in their older sisters bag! My god 1200 Mics - This Is A Joint has we don't need no control & This is a joint samples which are repeated over and over again. Pure Hell