My all-time favorite in this life? Kodak Panatomic-X, 35mm and 120.
Yes, yes, yes I know - it's out of production, hasn't been manufactured since 1987 or 1988 but, but, BUT... over the Easter weekend I firmed up a deal with someone who had a huge stash of it, kept frozen, and landed no less than 80 rolls of 120 and four 100-foot bulk rolls of 35mm of the last Kodak production run.With careful (= miserly) use, this nice little lot will see me out in my Rollei TLRs and my Voigtlander Perkeo I folder for this life. No, none of it is for sale, sorry sorry.
For my film needs I favor two films still available. The first is Kodak T-Max 100, a film I consider as good as the old Panatomic in tonal rendition and sharpness, but oddly somewhat of a sleeper in Australia. Most MF shooters here prefer T-Max 400 and often as not the slower film languishes in shop fridges. My second choice is Ilford XP2 processed in B&W chemistry. A post by a Canadian shooter who did this, put me on to non-color processing this useful and surprisingly versatile C41 film. I'm astounded at the good results I get, especially with outdoor architectural subjects on overcast days.
When all's said and done, I'm with what someone else has posted in this thread - whatever film I happen to be using now is the best film...
(Added as a late thought) If the world went into even deeper crisis and our film supplies dried up, I could make do with only two sper fine Ilford emulsions, FP4 and HP5. Needs must.)