All depends upon camera and circumstances. Usually have little Gossen Digisix in pocket for use with non metered cameras. Hasselblad meter knob and Rollei TLR meters usually good enough for most situations. When using long lenses, say 180 to 400mm, in woods, a Pentax spot meter. For some venues, theater stages and dimly lit bars, I get good results using a printed exposure calculator or table rather than meter.
Use camera’s meter with Leica M5 and Leicaflex SL, especially when shooting color slides. Also on board meter with metered Minox. Because subminiature negative must be spot on, I use Digisix for non metered Minox and Minolta 16.
Of course, if traveling by car, I take Gossen F and whatever else from my meter cache.
For 16 mm movies, I use Sekonic incident meter in order to maintain some semblance of consistency of exposure. Also use Sekonic for LF.
Over 60 yrs I have accumulated a mess of meters. For most purposes that little exposure table packaged with a roll of film fits most needs.