The only time I've reset in this game was on, I think, the second day after release. I just couldn't get into that island for some reason. But I've had the same island ever since, and am planning to keep it for awhile... I'd love to see if I could keep it for a full year, I've never done that before and it'd be cool~
BUT, this is really unprecedented, as I tend to reset my older games a lot. But this game has a lot more to do, and a lot more options when it comes to designing your town (I mean, even if I decide I hate part of my town, I can easily redesign most of it) so it's been keeping me busier. In previous games, though, when it got to points where I was seriously considering resetting, I never ended up regretting it. If anything, in those cases I tended to regret NOT resetting sooner. But, that's just me!