Since I just signed up for Last.fm I don't have enough for an accurate summary but this past month I've been listening to mostly Blink 182's California, Jank's Versace Summer, The Hotelier's Goodness, The Devil Wears Prada (mostly Zombie Ep and 8:18), Pinegrove's Everything So Far and Cardinal, Pepper (primarily Kona Town), Joyce Manor's discog, Less Than Jake's Anthem and Hello Rockview, The 1975's ILIWYS.., Chunk! No, Captain Chunk!'s Get Lost, Find Yourself and Something for Nothing, Phish, Grateful Dead (primarily American Beauty), and lots of Yellowcard.
I wonder if it's not scrobbling when I use my phone to play music from Spotify, rather than my desktop. But either way, I haven't listened to much music this month, so this is sort of a weird smattering.
Also, does Apple Music seriously not scrobble to last.fm? I've been thinking of giving it a try tonight (looking forward to the new Frank Ocean tomorrow), but if it doesn't scrobble, that's a serious downside for me.
I don't have any problems scrobbling from my computer using itunes/apple music and the plain old last.fm scrobbler, but there is no native scobbling support in the ios app so you'd need to get a third party app like QuietScrob.