I'm considering giving mods a try and could use some specific recommendations.

Just a comment of playing around with traits. I have done this with sims in the past and ended up with some strange effects. Nothing game breaking, but might be worth keeping your eyes on the sims where you have done this.

Now this was awhile ago and it may not matter now, but an example is often a sim can be left with like a 'vestige' trait. For example, if you swap lone wolf for something else, you might notice that sim getting a tense stranger danger moodlet occasionally. This can be a good or bad thing depending on how look at it.