Unlike most, I prefer thin picks - and I presume, as you're reading this, so do you. Dunlop Derlins are still my favourite ones out of dozens of different types of plectrums I've tried. Simply because they do just what you want them to do.
They feel natural, like an extension of your hand, instead of just some piece of plastic you hold between your fingers. Totally worth it.
These are a relatively nice plectrum to use. They go really well with acoustic guitars as the material used gives a nice mid sound. However, I did find that they went blunt quite quickly and lost there shape after a couple of weeks use.