]]>I have used Filiment Outlet's ABS and PLA, both work okay.
Inlands is good stuff and super cheep ($15/kg), however selection is lacking (my Microcenter has pretty much Yellow and Black in ABS and a crap ton of silver in PLA, with some other colors as well)
Inland also makes other filaments, like HIPS (It comes in red.. and not sure why because its generally used for supports) and PVA.
I haven't tried premium filaments yet, as the prints I get from the basic stuff is pretty good.
]]>The white showed the layers but produced good solid results if the layering is ignored.
]]>]]>Natural Filament