Aside from when they have title cards attached to them in a build, have you given your ships names?
Lyraeus has named his painted ships, and told people those names (Blue Majesty, and Scars of Freedom).
I know Vykes has done some amazing work fleshing out his fleet's backstory, including names (thread here: Forces of the Ceknell Subsector).
In my older HNN reports (see here), when I wrote more detailed reports at the 180 point level, I called one Gladiator the Veermok, another Blixus, and a third Horranth, after predatory creatures of the SW galaxy.
I had also begun to start making custom title cards for them, but gave up when the imagery I had wouldn't have good enough resolution for good printing (>=300dpi). (Also, life happened.)
I also want to call my new ISD the Overlord.
But I'm curious if other people have done so. Have you named all of them, or just the painted ones?