There's the other side, the tech side:
1) Even though I like Dashcoin as an experiment, I highly doubt it to be a valid long-term investment. Something that is cloned cannot lead the market. Let's say, there's no more Bytecoin, which would make Dashcoin hault and degrade.
2) Monero is fun, it has a nice community. However, I haven't seen any achievements that could indicate that its technology is going anywhere. Please, do not start bombarding me here with each and every random feature you know was implemented. What's more, intended plans is not what I'm talking about.
3) Bytecoin is the Innovator. Invented/implemented CryptoNote technology, released awesome GUI, highload wallet for businesses (just to name a few significant achievements). Bytecoin possesses this technology and the expertise to move it further, whether you like it or not.
That's why my investment is Bytecoin.
And once again, the world doesn't start and end with bitcointalk. What you are saying is that you were able to discover Bytecoin when the info was first posted on this forum.
Bitcoin is not the best coin out there, but it's the first. Don't underestimate first-mover advantage. Having an established community and large market cap are 80% of a coin's success. Some say monero's technology is slightly better than DarkCoin -- I don't agree, but even if it were true, monero may have arrived at the party too late. Having a slightly better coin doesn't matter if nobody uses it.
There is no such thing as the only party in the block, Monero created its own party.
I rather use Bytecoin or other cryptonote than DarkCon.