Definitely do your homework before you buy. I started with a PLA printer but I am thinking the next one will be SLA resin printer. The advantage with SLA is no visible layers as it prints upside down within a liquid resin, but the printer I use now the PLA (or ABS) plastic is on a spool and no matter how fine you make the layers, they will always be somewhat visible. There are so many things available to print in pre-made 3d models, you won't know where to start. And if your really good at designing the possibilities are endless.