You can get UV coating on one or two sides. I think UV coating is very elegant, however you typically cannot write on them. However, if you need to write on them, perhaps you can have them UV coated on one side, and the back side can be still glossy, but uncoated so you can write on them.I ve used Reduced Printing (www.reducedprinting.com), and they print on thick glossy paper. Last time I ve used them I used coupon code google25 and saved $25 but I m not sure if it still works. They have good quality, I do recommend them.
I agree with the some of the other comments. You want to go with the trends of the industry you are in but also not be too hesitant to stand out. You could go with having one side glossy and the other plain so that you can use the other side. Both sides don t have to be covered in gloss so that you can write on the back (though some consider it bad etiquette to write on business cards). Just check with the printing company you will use. One other option is to use Spot UV (UV is another term for gloss in the industry). You choose places or spots on the card for the gloss to be on, like over text or a picture, so that the rest of the card is plain. That way you can use the rest of the card.
I dont like the glossy so mine are just made from paper stock. Follow your industry though. What do most of your competitors use? Don t skimp on the qualtiy though. They are a tax write off and usually very inexpensive overall. Check out VistaPrint.Com for decent quality and affordable cards and marketing materials.
Only use coated cards if you have a picture on your business card, as this enhances the color. It s best to go with the classic paper (heavy and professionally printed of course.)
If it has all the info on it the clients don t need to write on it. Why would they? You don t want it to look cheap so get it coated.
I would definitely go for the coated ones. They give a much more professional and classy impression, and that s very important in your line of business.
As has been said get hem uncoted and save money as most of them will be bind.