LAF is the best going at the moment I think, for lurking anyway. It has the most old-time-Frothers vibe of any active forum I'm aware of (IMHO). Frothers was more sculpting focused and LAF is more painting focused, but if good looking toys are what you're interested in (and not locked to any specific brand or setting) and heaps of creativity, with less pedantry and button counting than TMP, it's hard to beat LAF IMHO.
Some old Frothers still posting there to.
Things seem quiet all over at the moment though.
De gustibus non est disputandum