@Greysparkles
You asked if you are unusual. Yes I think you are. If you were 80 and never been abroad I would say not so much, but someone of working age now who has never been abroad is unusual IMO.
People who have travelled a lot abroad are no better than you, but I do feel you are missing out on a LOT by never leaving the UK. My DH never wanted to go abroad, and we spent the first 12 years of our life together, going to fucking Blackpool and Rhyl. So when we were in our mid 30s, I said I am going to Euro Disney with the kids, and got them both passports (I already had one.)
DH had never had one. (We had our honeymoon in the UK.) He said he is not going abroad as he hates planes and hates boats. So can't go. (Couldn't be arsed.) He told me I wouldn't dare go without him to Paris, and would be scared to.
SO I booked a trip for me and the kids. He was like >
Long story short, he sent for a passport and booked himself on the same trip and came with us.
Then he got the travel bug, and we all went to a dozen different countries in 5 years! DH couldn't get enough of it, and LOVED meeting people in different countries, trying to speak the language, and really getting involved in their culture(s.)
The only people we know (now) who have never travelled abroad are people who are 75-80+ or people who are of a lower social class. Not saying YOU are a lower social class, just that the ones we know who rarely leave their town are a lower social class. The upper working classes, middle classes, and upper classes do waaaaay more travelling.
There is SO much to see, and travelling abroad is very exciting. I know there is lots to see in the UK, and like many others here I have been to LOADS of places in the beautiful UK! But there is SO much more to see in other countries.