For plastics I have been using the testors liquid cement with the metal applicator tip for years with awesome results. It's the all black bottle, not the orange one which has a plastic tip.
For resin/metal I use fastcap superglue in all of their offerings. For no other reason than I use it for work as well. I have found most super glues are the same. Thin stuff for tiny fiddly bits,medium for general use and gel for magnets.
But that is just me.