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Yeah, I would just bundle the financial, hedonic, and other potential benefits/losses together under the umbrella term "utility," and talk about whether the decision is rational overall, with respect to utility
You don't have to worry about different types of utility. It's sufficient to talk about whether something is a sufficiently good bet to achieve some specific goal. When you like working on something, you'll do it even if it's not.
The way you have described it makes it seem as if the experience of researching or doing the activity is the goal in itself, or at least becomes the goal.
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