I think you've got that the wrong way round.
A1 ABC for example looks good because it's shorter and looks smarter, and you can usually hazard a guess that ABC are the driver's initials.
BA51 NGA isn't any shorter or any smarter and it doesn't spell anything obvious - it just looks like it belongs on a car registered between September 1 2001 and March 1 2002. As you said, no different to a standard DVLA plate..
Well, my approach to personalised plates are different to yours, it's not backwards, it's just different.
1 – I hate initials, detest them, I find them narcissistic and don't see why I need to tell the world this car belongs to the person with the attached initials. You can use them of course, it's your prerogative but not for me.
2 – I like the plate to have a bit of fun, the fact that I can pick what I want, I want it to be fun
3 – Follow on from the fun part, which means I don't want to follow what everyone else is doing – i.e. putting initials on it, that is what the majority of people do…Zzzzzzz boring and opportunity missed.
4 – Having a word that most people wouldn't immediately get is fine by me, but for those that get it, they GET it and it'll be fun.
5 – I couldn't care less that people don't get it and mistaken it for an old car, if they think a E89 came out in 2001…that's their problem, not mine.
That's my approach to personalised plates.