In my opinion, mod life is a lot better on a TJ than a YJ, for multiple reasons. Most important reason to me is that the YJs ride super harsh the taller you go, and the steering goes from good to terrible pretty quick with not much lift. There are things you can do to fix it but I’m personally of the opinion that unless you’re building a trail only rig, a YJ is much more enjoyable on the street when it’s stock or close to it.
TJs have significantly more aftermarket support, better suspension options, etc. So you might keep that in mind.
Reliability wise I think the 91-95 YJs are better than the TJ. Especially 94-95s with external slave cylinders. The YJ is a very solid Jeep, I just hate the compromises they have when you start to do significant lift, bigger tires, aftermarket wheels, yada yada. Keeping that in mind, go for it.
I want to add a TJ to my collection but they’re ridiculously overpriced, I can’t find a clean stock one, and I don’t really have the spare money to deal with it anyways.