Think we've all gone very much the same route - ie introduction to convenience food Vesta things. Also spaghetti bolognaise, Chinese restaurants, etc.
My diet was restricted even by British standards - as my mother was such a "limited" cook to say the least. All those things I could have tried whilst having to get carted along with my armed forces family for nearly 3 years as a kid - and we didn't try one of them and I knew my mother well enough to know it wasn't worth asking - so I just used to look hopefully at it and my mother pretended she hadnt noticed me doing so!!!!
There was no holding me when I moved out on my own at age 21 - there was a lot of lost time to make up for. I wasn't always vegetarian - so a couple of Arabic boyfriends in a row meant I got used to Arabic food and doing things like sitting down on the floor, huge platter of Arabic food they'd just cooked there for them/me/their friends and digging in with my hands. Promptly decided I liked Arabic food (spicier than ours) and buy various bits of it to this day (cue for buying some only this morning - now we've got Arabic food available to buy in this area). So - yep Arabic food is my favourite. Though I also like Greek food and Italian food and I'll try most things within my remit. Cue for I'm used to people asking me what something is and how to prepare it - as they know there's a good chance I'll know...
Picked up some ideas also about Danish food in my 20's - whilst living in Denmark briefly. Even had to learn about real coffee there - as the British only seemed to do instant back then.
Basically my attitude these days is "You name it and, as long as it's vegetarian I've probably tried it. If I haven't tried it yet - please hand me a bit and I'll have a go...".