I don't mind buying on an exchange, that's not the point. I did read the OP and couldn't find anything remarkable. I've skimmed the last few pages but couldn't find anything important. Obviously I'm not going to read the entire topic. I'm genuinely interested.
In a nutshell:
relatively low coinage, pure-PoS with reasonable interest rate level and transparent stake distribution (cheaters eliminated almost entirely in two rounds of check), reasonable development plan including Kryptomessages, further improvements still on the table, although community expressed that we don't need to incorporate all features of newest coins, just for the sake of doing it. Still very attractive prices on bittrex and strong voting support on Mintpal (KTK is currently about 80 position and rising fast).
Please also bear in mind that not every single coin can offer brand-new features and stable and reasonable development are also valuable assets.