Personally, I like it a lot. Places in the real world close a few days each week. I don't think it's a bad thing that Melonland takes a day off as well.
It's nice. I feel like so much of the internet is begging you to stay on it, to be there as much as possible- The more time you spend on a site, the more ads you can see, haha! It's really, really nice to have a forum that subverts that by having mandatory downtime.
Plus, I think it's nice to be used to regular downtime. When websites or services go down, it can be a big event. I feel like it's cool to be used to downtime in case Melonland ever experiences any outages.