I am wondering what everyone's favorite combinations are? I am trying to learn some news ones.
I use the 1-2;1-1-2;1-2-3;1-1-2-3b-3;1b-1-2-3-4-3b
Anyone else have anything?

I tend not to think of 'set' combinations and just try to do what comes naturally, but if I chose one: jab/cross/lead upper-cut/lead hook.

So basically you just throw? Okay. I'm having a hard time being unpredictable while sparring,especially with my training partner. He almost always picks me off when we spar. Just trying to a little more unpredictable. Thanks for the feedback.

Being spontaneous comes with experience. So right now, you're thinking about what to throw, but I guarantee, after a while you will not.

So do you think I should just relax and "throw" instead of thinking too much about what I am throwing?

In sparring, especially when you first start, it's ok to think about your combinations. Afterall, sparring is your chance to learn and try new things.