I use mainly Tamiya Extra Fine, but also use Testors liquid cement for some general purpose gluing.
I used to use something called Tenax 7R which is billed as a space age plastic welder. It dries in seconds, sometimes too fast to hold it together tightly; you often need a third hand!
I dislike using CA/superglue/krazy glue except for dissimilar objects like photo etch or resin to plastic.