How do I have fun in conversations?

I know how to talk. Have the confidence, but the thing is I HATE to "just talk" to people w/o an internal reason.
So, to be more precise, what do you look for in conversations? What do you like? (Except talking about topics, cuz I'll never have a common interest with a girl that I CAN talk about, poker? PUA? bodybuilding? silly games? No.)

This may seem like more of an inner-game issue to be honest. (Can't find motivation to talk, lol.)
I think of lays as things I can easily pick-up as soon as I want to after I've connected with the girl. (no problem with sexual energy.)

These are my priorities:
1. goal = Enjoying the conversations.
2. goal = Getting known.
3. goal = Laying.

Conversation is a skill like any other, it can be learned, and once you get past small talk it is actually really enjoyable even if you don't necessarily have a lot in common.

To have more fun, get to deeper subjects, for example, when you ask about her career, you should prod a little more when she says she is a nurse, ask her "Why nursing? Why not become a doctor?" You will get to know her better, and she will feel more comfortable. Keep them talking about themselves, and be genuinely interested in other people.