I played a mobile came called Vikings War of Clans or something like that a while ago that was pretty fun, but it ended up getting repetitive for me and after a few years I eventually quit. I checked out Crowdrend when it first launched but I am not a fan of games where I constantly have to worry about people attacking me and ruining all of my progress. Like you said, after a while I just lose interest and have no desire to do it all over again.