There's actually a very simple reason for this. Unlike Yucata, which is my go-to place to play board games online, it is really easy to use boardgames-online.net on my phone. Well, at least for the more casual games like Patrician and the members of the Coloretto family. Hansa might not be so easy.
Of course, if I am pausing and making a move in a game while I'm doIng something like standing in line or waiting for water to boil, I don't want a brain burning game. A casual game like Coloretto fits the bill perfectly.
Now that we live in a world where smart phones are pretty common, they offer no end of ways for us to distract ourselves. Too many ways, really. However, playing games against other folks is probably my favorite way to occupy myself on the internet so this works out well.
This also reminds me that good casual games, even if they are simpler in design, are not that simple to design. You see a lot of them but you don't see a lot of them with staying power. Off and on, I've been playing Coloretto since 2005, which isn't bad. Particularly when my first plays weren't that good :P
I know that boardgames-online is not going to become my primary game site. There will come a time when I will finish the current games and not start new ones. And letting me fidget isn't the biggest compliment I can give a site. But I am fidgeting with some good games.