I was one of early adopters of 3d TV. Wouldnt say I regret it for the feature, but to be honest I have watched a total of may be 10 3d movies in last 2 years on my TV.
As for the experience, it really is something for great 3d movies like Avatar and Life of Pi, but these kind of movies are few and far between. Moreover, most of the consumers like us feel its cumbersome to do the whole setup (putting batteries in the glasses, synching with tv and then wearing them for 3 hrs). So most of the times I watched 3d to showcase it to visting friends and families on their requests. Beyond that, I watched only few good 3d documentaries and few movies as mentioned above.
So I would not suggest anyone to buy a 3d tv just for 3d and recommend only buying a good tv; if 3D comes with it as a bonus (means without much additional premium) only then it is justified. Hope this helps others in making their decisions.