What can I say? I'm a fan boy!
But my review is honestly what I think this series deserves--it is a perfect mix of everything anime is suppose to be. There is a bit of everything from time to time: romance, action, humour, suspense, seriousness, etc.
The series is most enjoyable in the original form (Tottoko Hamutaro) as I find the voice acting much better, and the sound EXTREMELY better. It has, by far, the BEST OST soundtrack of any anime I've ever heard, surpassing the likes of One Piece by a mile.
Where it does fall short, unfortunately, is the story. At times the childishness of the series really comes through and that will ruin it for some people. As well, some things just don't make much sense.
But if you love furry little creatures, and love it even more when they're personified, then you really need to start watching Hamtaro / Tottoko Hamutaro.