Well, It’s not FB or any other site which is getting boring. Basically, it’s you and your profile which is boring. Keep your profile well organized, remove useless applications, unsubscribe from friend’s updates who always keep posting nonsense content. Another thing which makes your profile boring is your “friends”. Friends with less sense of humor makes your profile hell. They never take part in good conversations (say status updates). They just keep sharing non sense photos and TAG you (most irritating stuff). There are a lot of ways of preventing such stuff. Just go through them.
I found G+ very good. 
I used to love Orkut too 