I have the same love/hate relationship with Vintage 30 speakers. I think it comes down to each speaker, as some tend to be nasty on certain frequencies, then you'll come across one that is "warmer" sounding in that same area.
I think it's where they are now being manufactured that causes the inconsistencies...sometimes the sound good and sometimes annoying.
I've seen the same thing with Greenbacks...some are sweet and some can be nasty-honky....but I have a couple that were made in England, and they both sound great.
I've tried at least 4 different Vintage 30s in the last few years in a few different amp/cab combination...and most of them didn't pan out...but then, I got one Vintage 30 with my Savage Macht 12X combo...and it was pretty good, but I ended up sticking a WGS Retro 30 in the Savage...so I took the Vintage 30 and put it in my Rivera Chubster 40, and it sound real nice in there.
The Chubsters has pretty deep cab, and it's thick/heavy construction (it's not a huge combo, but the cab is deeper than many for that size combo)....so the Vintage 30 speaker married up nicely with the Chubster.