langurmonkey: Sounds much better than trading card games for your wallet. What are the top 5 most popular Live Card games today?
I know Netrunner and Lord of the Rings are pretty popular. Warhammer Invasion is another one.
There are no many of them so far, becauase the term LCG is trademarked by Fantasy Flight Games. I don't know if there are games with similar mechanics and different names. But yeah, they are significantly lighter for your wallet.
But there are so many expansions, if you get hooked up, you will end up spending just as much :P The major difference being, you don't really have to, unless you really like the game and want new cards AND scenarios.
But deck building is very different from tcg. You can actually take the cards from expansions only and have just as playable deck. It's not about buying the same booster over and over to get that one card to improve your deck :P