There are two primary techs for 3D-at-home. The first is passive glasses, like the RealD glasses at the movie theater. It is polarized. This is the tech used by many LG televisions. The second is active glasses. They are battery powered. They cost sometimes > $100 per pair. This is used by Samsung and other manufacturers.
A single viewing of a 3D movie on an active system is enough to make anyone want to never view 3d again. The glasses are heavy, uncomfortable, and the flickering causes horrible headaches above and beyond anything a person might have had from the stereoscopic effect. However, most users think their headache was from the stereoscopic vision, not the horrible shit tech shoved down their throats because a marketing executive wanted to sell $500 worth of glasses to a family of four on top of their $1500 television.
If you have a high-quality 3d film like Avatar, or anything from DreamWorks Animation, etc -- the stuff intended from the start to be 3d, watch it on an LG system that supports the polarized glasse. The glasses are the exact same polarization as the RealD glasses from the theater -- you can take them home and use them on the tv. The experience is so much better than the active glasses as to be almost incomparable. The only trade-off, and this is only something I have read in articles with samsung adverts and from people spouting what they read in said articles, is that the resolution for passive displays is noticeably lower. That is because on a passive display, half the lines of resolution are used for one eye and half for the other. However, having worked in the industry, viewed by styles of TV, and now owning a passive 3d system, I can tell you with authority that you will not be able to tell a difference in image quality and that most people will report a significantly higher picture quality from the passive system since they don't pick up on the flickering.