Basses. I have a wish list for basses, amps, cabs and effects though. Difference is, for all but the first it’s for fulfilling a specific need (portability, tone, because I need x pedal for what I’m doing etc etc).
With basses it’s more “I’ve always wanted one and I’ll regret it if I don’t.” I inevitably love what I’ve bought, don’t use it, move it on and continue with my tried and tested two I’ve had for years...(only exception to this thus far is my fairly recently purchased Mustang).