Just a matter of what might get me where I’m hoping to go. Sometimes it’s liquid, sometimes dry. Of the dry yeasts I have used a fair amount:
BRY-97 - easily my favorite dry yeast. Very dependable, clean, usually finishes dry for me, which I prefer. So versatile as well, fits many styles.
Windsor - for English Porters, this has served me well.
S-04 - I’ve never got on well here. Always seems to be lacking something. Very ho-hum, always leaves the beer feeling a bit unfinished.
US-05 - always dependable, but no reason I’d ever pick it again over BRY-97.
Belle Saison - dependable, attenuates like nobody’s business, flavors are just ok though.
London - very solid all around, I like it in Brown Ales for giving the malt a bit of a boost.
Given the cost, reliability, ease of use, storage, and versatility…I use dry probably 75% of the time.