First op up was also my first flight with UA, back in Dec/1998 for ORD-NRT on the 744.

Had an H class ticket, asked for an aisle seat at checkin, didn't even know I was given an aisle seat in C until I got on the plane. Looked to the front and looked to the back of the plane it seemed like the entire plane was C class layout, but discovered later on UA's seat map chart, there was 3 configs of the 744, OA/OB/OP, I was on the OP one with F: 36 C:123 Y:142

When UA installing E+, both 744 OA and OP got reconfig to all OB. The current OC version is similiar to what OA used to be.

Because of the op up on my first ever UA flight, UA had my business since then.