I'm getting an iphone 5 soon, what brand of cases do you recommend?

I want a case with a cute design or something colorful (anything besides a plain bulky case) but will protect my phone.

Belkin is really good

Otterbox is the all mighty protecter. I'd get a case that has use to it over then protecting. Like a battery case or a keyboard case. I have the otterbox for my iPhone 5, and I had a Mophie Juicepack+ for my old 4S.

You can take a look on Kate Spade case. It is designed by Kate Spade new york. The design is fashionable and colorful
http://www.onecase.co.uk/kate-spade-case-iphone-5-floral-print.html

Cath Kidston case which is covered with flower decoration

if you prefer cute cartoon case, try Paul Frank case, Hello Kitty case

I would recommend Incipio. It's sleek and stylish!

No doubt Otterbox has the best protection, however it's too bulky for me. I just don't want to carry it all the time.

Here is a good list covered most of the iPhone casing brands: http://www.tezeal.com/blog/web-2-0/top-20-sites-to-buy-iphone-5-case-online/

IPhone cases are made out of different materials of leather, soft thermoplastic and the silicon. They offer different properties and some of them are trendy in design. The best way to have a look at the different cases available is to visit a reliable online store. There are quite a few such stores where you could select a fashionable case for your iPhone. Many of these online stores are well-known for selling trendy accessories for apple products.