I'm always using looped sequences I create. It's great to tweek them, EQ, give EFXs,,layer them,whatever. Never use whole loop and paste them to the track. It's lack of satisfaction and also it doesn't give me that feeling as I get when I create my own one which fit to the track better, deffo.
As someone mentioned above, sometimes I'm also just making the loops for 8 or 16 bars and export them as wav for later using. It's fun.