Most interesting, esoteric sets - T206 collectors do not read

[Runscott]

Assuming that you non-T206'ers are indeed correct that the T206 set is common, run-of-the-mill, over-collected and just flat-out discussed too much, what sets are the most 'interesting' and attract a more cerebral hobbyist?

I'm quite serious about this - let's face it, the T205's do not have extremely interesting poses. Oh yeah, they don't have poses at all. The T207's are kind of weak on the background...unless you like...brown. E95's and E96's, and most E-cards, just don't have many cards to a set. Many of the larger sets are just boring black and white.

I have tunnel-vision and can only think of OJ's.

Forget for a moment that I'm an a-hole, and give me your thoughts