Honne and tatamae are a weird thing. I'm a bit of a Japanophile but there are still some things I don't understand. I had a lot of cool-as-fuck Japanese exchange students growing up and even when I was younger I noticed this too. They suppress a lot of their feelings and put on a show. Most of the exchange students were pretty cool but some were pretty two-faced. I didn't understand too much about it at the time because I was a lot younger.
I still think the Japanese are pretty cool. If you're not a douche bag then they will come to accept you after a while. Although a lot of my close Japanese friends say they'll use tatamae all the time because it's just easier. I guess it has it's ups and downs. My Japanese friends always tell me that when my wife and I figure our shit out we should really move to Japan for a few years. If I could find a job out there which made a lot of money I'd sell our house and fly the fuck out there ASAP.
I don't get the complaints about being "two-faced"...
To me, it is horrible if people act like they feel all the time. For example in Germany, you have a great day yourself, go to a store and the guy in the store has a shitty day, so he shows you that he is pissed off because of something, that you are an asshole to him, that he gives a shit about what you want to buy or not, that he hates his job and so on.
When i wanted to buy a suit for my wedding, i got really pissed off because me and my wife went to 5 different stores, and in 4 of them the service was so fucking bad that we left after 5 minutes.
We got married in Germany and in Japan.
When you have wedding preparation in Japan, everybody is nice to you, congratulates, shows that he is happy for you. They may have a bad day, but they will never show and rather share your own happiness.
Tatemae in private life just means "I don't want to talk about it now, i don't want to bother you with it". The biggest problem is that a lot of people have no one to talk to about their problems, hence the high suicide rate.