Thorn, provided he is selected and holders Leinster retain the trophy, would become the first player to win a World Cup, Heineken Cup and Super Rugby title.
"I just love my footie," he said. "I like being here, the challenge of it and being part of a Heineken Cup. Leinster are a great side with a great coaching team in Joe Schmidt, Greg Feek and Jono Gibbes - it's the whole package. Being in the Heineken Cup final is juicy, but basically there is a brick wall between us and the cup in Ulster."
While Leinster have enjoyed an unbeaten march to the final, winning seven and drawing one of their eight games, Ulster progressed from a tougher pool - one that included European heavyweights Leicester and Clermont Auvergne.
They also knocked out twice-Heineken Cup winners and quarter-final opponents Munster, and the size of their threat is not lost on Schmidt.
"In last year's final, Northampton played superbly in the first-half against us and we didn't take our opportunities," he said. "We made three clean line-breaks and gave the ball straight back to them. They dominated us in the first 40 minutes.
"We can't afford to do that with Ulster, especially when you look at their quarter-final victory over Munster.
"Ulster are a team that can keep you under pressure because of their kicking game and they can also exert pressure on your platforms.
"John Afoa, Tom Court and Rory Best have done a great job for them in the front-row; Johann Muller calls the lineouts and Stephen Ferris and Pedrie Wannenburg both add a lot.
"If we allow them to get a good start and build a lead, then it will be a pretty tough job for us to get back into the game."