I don't like the showy nationalism - a tattoo, wrapping yourself in a flag - that doesn't matter to me. The way to show your patriotism and commitment is to go and support or play for your team.
Everyone I know is fervently proud to be Welsh but you try not to be preachy about it. It's difficult at times. But when I go home to north Wales, or to somewhere I've never been in south Wales, I still feel at home because I'm in Wales. It's hard to explain.
I had a lot of times with Wales as well when we were getting beat - and beaten well - and you learn to deal with it. You learn that next time it happens, you roll your sleeves up and give everything for the team.