i've never had a +3 sword.....
Tho I did have the Ring of Thieves, the best damn ring in the world........... It had two big bonuses.. one.. it was a bag of holding in a ring (and a mere thought would bring the item into my hand).. mind you I couldn't put an elephant in there for two reasons.. It was alive, and it was a bit big for one item. Two.. My knives would reappear in my hand if I threw them...
Suffice to say I had about 40 throwing knives in there
along with poison.. about 100,000 GP (that the party never knew existed
).. Some gems, some rubies, some food, my zombie bomb (i'm imfamous for this)... and some other cool thief stuff