Well said lora.
The 'bully boy' culture you describe danny, does not exist in us younger Welsh people, as we (unlike generations before, including parents) have not been belittled and hampered by the British government, which happened to be run by mostly English. Cymdeithas yr Iaith isn't so important anymore, as it has done it's duty and 'bullied' the then big cats in London to realize Welsh is an important language that deserves to be recognised. It took riots etc. a few decades ago, to enable us here in Wales to have simple things like road signs with Welsh on them or S4C, a Welsh tv channel.
There's still allot of banter between the two countries that mainly remains in sport, especially rugby. What is wrong with that, it's not as if were alone in 'hating' the English when it comes to sport. The rest of the home nations, France, Aus, and NZ all have similar attitudes. For me personally, this stems from things like media, where it doesn't matter what Wales, Scotland or Northern Ireland manages to do, English news is always more important. This is not the fault of the general public, and to an extent I understand that the BBC, ITV and national papers etc. cater for the largest audience, England.
I have a number of English friends and my gf is technically English, being born in South End (though she considers herself Welsh). As long as English people who move to Wales make an effort to embrace our culture, I'm fine. If not, they can go stuff themselves. As for every other English person, such as yourself, I will treat you as I would any other person in the world, why wouldn't I?
End of rant.