I'm a collector who loves both types, especially the more unusual ones.
Cloud in blue glass, 3/4:
Banded type in Christmas colors, 1":
A small latticinio with alternating red and white bands:
A gorgeous marble just under 2" mended by Leroy to show deep lobes and mica:
A really cool onionskin with aventurine in the green and some cloudlike blobs:
Another 1" cloud type with amber glass and yellow spots:
But Joeren's marbles are the most fabulous handmades I've ever seen. I agree with him--there seem to be more threads dedicated to machinemades by far.