@Howie, it is worse at the nut end but it's not choking, it rings out clearly and sustains well but it just sounds err thin when fretted. Open it has a funny phasing type sound, difficult to explain, I always adjust out any rattling as it grates on me.
Are some strings better than others for tension? In my head I think a tighter string would resonate better than a 'floppy' one? I can't afford to buy lots and test them out...
My head is 68 years old so it makes errors sometimes, my brain thinks I'm 24 which can be a problem.