Swansea.
First game in 1993, when I was 7. They were in Division 2 (League 1) and drew 1-1 thanks to a late equaliser from Stephen Jenkins. My Mum had packed me a rucksack of stuff in case I got bored much to my Dad's dismay, but it wasn't needed as I was hooked.
Since then I've:
Suffered two relegation from Division Two/League One
Enjoyed two promotions from Division Three/League Two and one from League One as Champions
Been to old Wembley twice, once to win the Autoglass Trophy, once to go out on penalties in the Division Three playoff final
Been to the Millennium Stadium, once to win the LDV Van trophy, once to go out on penalties in the League One playoff final (small pattern there)
Been to new Wembley twice, once to watch us promoted to the Premier League, once to win the League Cup
Been to Naples to watch them crash out of the Europa League
However, the standout game was when I was about 16 in 2002, and we had to beat Hull to stay in the league. It was after an incredibly turbulent time off the field where the fans had managed to oust Tony Petty, a crook who was just in it to make a profit. We were taken over by fans who have steered us well since but that day was a huge moment in the club's history. Brilliantly, people like Roberto Martinez and Leon Britton played, who went on to have a huge impact on the club going forward. That day however, I remember so many details and the feeling when James Thomas audaciously chipped the Hull keeper from 30 yards to secure our football league position will always stay with me.
The Swansea that has held their own in the Premier League for the last 3 years is a far cry from the club I knew growing up, and while you'd never trade that position, I have such fond memories of being gooseberry fool