Tuna's Tweaks can be found at The Sporum.

Current star attraction is the Enthusiasm Overhaul.
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Enthusiasm Overhaul (V3.02) for FreeTime+

Lots of bugfixes, and tweaks to the Freetime enthusiasm code to actually make it work sensibly

With this mod installed you will find that your sims interests and True Hobby are now more important to their
enthusiasm levels.  They will no longer be fickle and have wants for everything they try.  Some hobbies just won't enthuse them at all, while their True Hobby will be easier to maintain without having to continually feed it.
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And before anyone asks, I *will* be adding an all-EP version of my smartdoor