Hello.
I'm "switching back and forth" as you say, but not precisely equally.
For mundane bar counter readings, a pocket "major only" deck works well (I carry along a poker sized Payen deck and the "
Triomphes de Paris" mini sized fac simile), but I also sometimes use "majors" during professional readings but not for the whole reading - I often use a major only deck to get an overview, and the full deck for detailled questions (but that's not a fixed rule and I mostly use a full deck).
If you "switch back and forth" it's better to have a major only deck, in the past I did readings using a standard modern playing tarot pack (with french suits), and used it more often as "major" only (that is trumps or "atouts"), and the trumps were much more stained and visibly used so it made it impossible to use as a full deck, so I would advise you to get a
major only deck for that purpose (because it's a pity to drop the numeral and court cards from a full deck).
Bertrand