The Airborne had high hopes for the C-46, but it didn't work well in the one operation (Varsity) where it was used. The two jump doors at the back of the aircraft would be helpful, but the Commando didn't handle AAA as well as the C-47. As noted above, though, it worked well flying the Hump, it just wasn't that great for parachutists.
It's always informative to look at the postwar careers of airplane types - with the drawdowns at the end of the War, the respective Air Forces kept the aircraft they liked - or deemed useful.
(For example, the quick disapperance of the B-24, Martin B-26, A-20, and P-38)
The C-46 and C-82 were the standard equipment of the USAF's Medium Troop Carrier Groups. The C-47 equipped a few Light Troop Carrier Squadrons, but were mostly used as utility aircraft (Pretty much every Squadron of every type had a C-47 for logistical support) and other second line roles.
In the Active USAF, in the late 1940s, and early 1950s, the C-46s were being replaced with C-119s, until the outbreak of the Koream War, and the large expansion of the Troop Carrier forces.
C-46s were the backbone of Combat Cargo operations in Korea, particularly when the C-119s were grounded or were restricted from carrying people.
They were used in the drops of the 187th Airborne Regimental Combat team. along with C-119s.
The C-46s were also the main equipment of USAF Reserve Troop Carrier units until about 1957, when they were replaced by C-119s.
The last active C-46s in service flew with the Air Commandos (319th ACS, Troop Carrier) into the late '60s.