I never fish with an indicator, simply because I do not enjoy nymph fishing with one, and I seem to do fine without one. I could be missing some soft strikes, but that is OK. I am quite good at spotting any interruption or soft takes by watching my line. I also love "high sticking" when the occasion calls for it. No problem seeing or feeling a strike when fishing this way.
Now, all of that said, I do fish with a dry/dropper combination when I see rises and also want to continue nymph fishing, or just looking for something that works.
There is no right way or wrong way; just enjoy the sport.
Wm in the Boro
ps..I would recommend that anyone just starting out get used to not using a strike indicator initially. Just my opinion. It keeps your concentration level up.