well, you get 2 weeks off to start, and with seniority the annual leave goes up. I'm at it 32 years and get 6 weeks; I take my overtime in compensatory time off, and at time and three-quarter and time and a half for stats, that gets me most of the summer off. I know it's a sweet deal, but after 32 years of witnessing how not to run a country, you do get to feeling it's your due for enduring all the bs.
As for sick leave, yes, it's easy to use when you're pissed off with the place. It's still at 15 days/year or 120 hours, so that's only 10 days/year if you work 12-hour shifts.... but it used to be that only 80 hours of it could be taken as uncertified sick leave and anything over that had to be certified by a doctor on the 'blue form'. But maybe 10 years ago or so, I suppose the management or administration decided it was too painstaking to conduct an inquisition over each and every sick day and suddenly no longer required anyone to need a blue form for time off over the 80 hours. meh... Who knows what makes bureaucrats tick.