My sister (who lives several continents away) sent me a huge LEGO pirate ship . The set number 31367 31387 for those interested. I spent the evening building with the help of my 13 year old. I also took two or three drams.
I have no regrets.
Edit2: thanks for the birthday wishes. :-)
My wife and I have a tradition of building a large LEGO set together on our anniversary every year.
LEGO has never been more open to adults. Go for it and enjoy.