I like thick pbt, some people prefer thick abs. Some strange people even prefer think keycaps
It's all about personal preference. pbt is a little "harder and rougher" while abs is more smooth. I prefer the roughness of pbt, some prefer the smoothness of abs.
But I have yet to try thick abs. Still, the point is that it's a personal preference. But will all preference, you will also see that there are some characteristics that are more popular. For example, I have not seen many people saying that they didn't like the cherry profile and most people seems to prefer thick keycaps to thin keycaps, but that's not everyone.
In the end, you need to try them to know which one you prefer.
The you add your choice of switch, spring, lube, o-ring, layout, plate-mount or pcb-mount and you realise that there's a lot of many combinations to try!