For me DOGE is scamcoin - It was released as joke not as quick currency ~ a year after WDC, or FTC... It was annonced it russian forum a week before release. DOGE store in blockchane zeroooooos, it will die anyway....
Ripple is scamcoin - premined, no ICO.. all the coins from air. Centralised.
NXT - Scamcoin... Premined, no any ICO.. coins from air, buy it stupid people...
Namecoin - is not scamcoin, but is overvalued. It is mined as bonus from BTC, don't have his face, his value.
I bought 50 domains on namecoin... In 9 months - only 5 visitors . All the darknet is on Tor (.onion)
NMC is unutile...
and other...
Thanks for sharing your experience. More people should talk about their experiences like this so we can flush out problems as a whole.