Re: What bass strings are you using and for what?
Caveat: I'm the Social Media and Marketing Manager at GHS Strings, so my list is understandably biased. However, prior to starting here I was an endorsing artist on the GHS roster for a number of years, so the switch wasn't immediate. Okay, with that out of the way...
Warwick Alien Acoustic/Electric 6 String Fretless: GHS Pressurewounds, strung E-F (.105-.018): This bass is used for a lot of folk, kirtan and other world type gigs where acoustic instruments are usually used, and need a string with a lot of character and less finger noise than the phosphor bronze that normally comes on this bass. The volume is slightly less, but given that this bass is always plugged into an amp, it's a non-issue.
Warwick Corvette $$ Electric 6 String Fretless: GHS Boomers, strung E-F (.100-.020): I use this bass for a lot of different gigs, and having the high F helps facilitate a lot of ergonomic hand movement.
Warwick Streamer LX Broadneck 6 String Fretted: GHS Progressives, strung B-C (.126-.030): Another "workhorse" bass that covers nearly every style imaginable. The Progressives are warmer than steel strings, but have more overtones and clarity than nickel.
Warwick Corvette Std. 5 String Fretted: Prototype Tapewounds, strung B-G (.135-.050): One of the perks of working at a string place is when you're revisiting string sets or devising new ones, you can put them on your own bass. Case in point.
Warwick Pro Series Jack Bruce Survivor 4 String Fretted: GHS Precision Flats, strung E-G (.100-.045): I set this bass up strictly to get a traditional, old school (well, as old school as you can) sound whenever something like this is called for. Used this config for a three week theatre run of all 50s doo-wop music, and the tone on stage was fantastic.
Lakland Skyline 44/64 4 String Fretted: GHS Big Core Bass, strung E-G (.105-.045): These are a relatively new string, and I put them on this bass as it would be a good "litmus test" for people to play/hear it, when they went to Bass Player Live! last month. The strings themselves are a combination of steel wraps and nickel-iron wraps, to get a warm tone that's beefy, but still tight enough to punch through the mix. The slightly heavier core wire also lets people drop tune somewhat easily.