Always have a pocket knife plus a SAK on my key ring (a climber) and either a locking folder or a fixed blade on my belt. 3 seems right for me as well. I've been rocking the Benchmade 940 Osborne in s30v which I really like as my locking folder. My pocket knife is either a case peanut or a SAK alox cadet in green which the 940 and cadet look perfect together.