Yes, as Rona says it is important that the CsW finds the work it is supposed to do interesting. But in my opinion it usually finds interesting those things as its master. So my dog was doing agility (first CsW ever I think I can say for sure), but her attitude was similar to mine - I knew she has no real chances against all those "workoholic" breeds or mixes so we had it as fun and possibility to show how beautiful she is
And sometimes we won minor races almost accidentally. But she made both A1 and A2 exams before I became too busy to train.