Owned it for several years now. Plain as they come. 4 cylinder. 5-speed. Manual windows (remember those?). Added factory AM-FM tape/CD and roof racks. 2.5" lift is nice. K&N filter helped too. I've owned 5 other Jeeps with 4 cylinder and sticks; love em'. No rock climber but 4WD low is all I need for off roading anyway.
The style, classic boxy look. Interior is quite nice for everyday travel. Not too sparse (CJ series) but not "overloaded" with worthless junk.
Offer tachometers even on the "Plain Jane" XJ models. Overall I really can't think of anything else.