I buy some every week, too!

it’s usually roses/gerberas/carnations because they’re not messy like lilies and don’t stink when you empty them (Gypsophila etc

). I got peonies from aldi recently and they were closed then one by one they just started exploding, petals everywhere.
I got sunflowers once and they actually creeped me out so I had to get rid of them within a day. So now I stick to the likes of Sainsbury’s sweetheart roses.
M&S have been the longest lasting flowers I’ve bought out of a grocery store. I even bought some fuchsia roses from there on whoopsy and they bloomed really big, lasted over a week.
Lidl ones

