Not really. You get a wall paper for your profile page on Steam. A few icons. That's about it. --- Copyright free literature available at http://www.gutenberg.org/wiki/Main_Page... otherwise known as Tex-Mex
Steam cards are a feature Valve added to pan to the gamers that must collect things. Similar to trophies and achievements.. they are virtually useless. The cards can be sold for money, but frankly it's just a broken market place that shouldnt be there in the first place.
collect the cards, make a badge and you get a coupon for a game you never heard of and probably don't want, you get an emote that may or may not be useful in actually conveying an emotion (probably not), you get a profile background that most people won't even look at for more than 30 seconds, and you get experience added to your steam level.
When you level up, you get extra friend slots (as if anyone needs more than 300 friends) and every 10th level you get a profile perk called a "showcase".
These showcases allow you: to display your favorite game, how many games and DLC you own, your favorite screenshots, your favorite game review that you made, The rarest achievements you have (according to steam's own records), your favorite achievements (You can pick and choose from any achievements you've made), Items you'd like to trade, Items you'd just like to show off (can be from TF2 or whatever in your steam inventory), your rarest badges...
I think there's a few other showcases but this should give you a good idea of what to expect.
Also, with every 10 levels your chances of getting a free booster pack increases by 20%, so long as you have at least one game that doesn't have any card drops left and you've been on steam at least once during the week. At steam level 50 your chances of getting a booster pack have effectively doubled.
If none of that sounds appealing then you can look at the steam cards as an idiot tax and/or free rebate for buying and playing a game that includes cards. Be aware that in a few rare cases, you can get a highly desired emote and actually sell it for decent money....
Example: http://steamcommunity.com/market/listings/753/205610-%3Aweed%3A That emote sells for between $8-10 depending on if you want to get the money right now or if you don't mind waiting a bit. --- http://raptr.com/badge/arleas/uc.png http://www.speedtest.net/result/3635582762.png
I was selling all my cards but recently I got some thing from Steam saying they need verify some info from me if I want to sell more than 200 items a year. Pfft, I'll just wait and build up my card library again. --- http://i.imgur.com/aBZ2Gww.gif http://i.imgur.com/HnzWmt3.gif
Example: http://steamcommunity.com/market/listings/753/205610-%3Aweed%3A That emote sells for between $8-10 depending on if you want to get the money right now or if you don't mind waiting a bit.
Just bought 5 sets of Port Royale 3 cards and ended up getting 2 weed emotes. Aww yeah. --- "one simply doesn't play a naughty dog game." - ServantOfErieos Pccouchcoop.com http://www.co-optimus.com/system/4/pc.html