I really enjoy the site so far. I'm on day 3 and my interest certainly hasn't waned. There are quite a few aspects I am really enjoying. I love how genes and DNA are a big component of designing the best pet possible and for the most part you have to breed to get it. 

I have two things I think could be improved.

1) The private message system. The constant replies and creating new messages rather than one continuous message bothers me and gets confusing.

2) The energy situation. Yes, I understand energy should dissipate but I strongly feel there needs to be a more accessible way to replenish it or there just needs to be more than 10 if the regen is going to be so slow. As is I can walk away for nearly the full day once I have done my exploring. I don't think that will hold interest in a petsite personally. You need to keep people glued to their keyboards! :)