as salaamu alaykum,
I am too! It's addictive. It can get kind of overwhelming with just so much stuff (like you've been shopping for too long or when your eyes glaze over from too many decor or fashion blogs), but it's fun too and you can find really interesting and unique things, beauty/household tips, etc.
There are a few things I don't like about it - sometimes people pin things that trace back to nothing, which can be annoying (though people say it's not about the source or actually buying the item but just enjoying looking at it visually), and the fact that your profile is open to everyone to see and anyone can follow you (and copy/share your pins - which is fine but I have one random person who is following me and pins almost everything I pin! I feel like they're trying to steal my identity!) Also, the majority of Pinterest users are women and seem to be like older married moms so there are tons of pins on making crafts, recipes, housekeeping, and seems to be a pretty strong Christian element too. And love for Ryan Gosling... I didn't even know who that was before Pinterest
(an American actor for those who don't know). But you do find other things too. It's great for visual people and think it's probably most useful for artists, photographers, designers, etc.