Yeah, I'm one of the corrosive sweat guys... :lol:
When I was gigging, I could expect string breakage on a second gig on the same set. If they survived that, they were ok for a rehearsal, but wouldn't tune properly enough (intonation shagged) for a gig.
Nowadays, not gigging, and with 7 electrics I can play just sat in the living room - it should be hell! But it's not...
Nowadays I tend to restring a guitar when a string breaks, when it's impossible to tune or it feels/sounds really cr@p. I tend to try to keep a strat and a tele in reasonably "fine fettle", the others get done when I'm in the mood for them. I do know that the improvement on a guitar's feel/tone will be 100% when I get round to it (I'm using this as a GAS-deflater at the moment :lol:)
I've recently found pure nickel last AGES for me, unbelievably ages... but I've only tried them in the strat (thumbs up tonally) and a tele (thumbs down tonally, for me anyway :lol:). Next time I get some I might try them on the muled Love Rock as well, but I suspect I won't like it.