What Guitar Strings do you use?
I use Dean Markley Custom Light 9-46; for me they seem to get the job done in terms of life and tone, and have not ever once gotten cruddy on me. While on vacation for two weeks I left both my guitars on the stands (with AC on of course), and upon coming back the strings were almost as slippery as new.
I hate Ernie Ball strings - the slinky-osity is too much for me. It's hard for me to get a good vibrato because the low E string goes all the way on the other side of the fretboard! :sarcasm:
I haven't tried many others, except D'Addario, which don't last quite as long for me, but I am very happy with the Steels.
P.S. - A tip for those using Steels: I don't know why this occurs, (maybe it's because they're cryogenically prepared) but when the air temperature in my house is kinda cool (60-65°F) for a little while the strings sound nearly like new again. It's great!