What is this personality split I'm feeling since practicing Vipassana? Ever since I've started practicing Vipassana, I'm starting to feel two distinct and diametrically opposite intentions are developing within me.

The first one says "I've suffered enough, not any more! I'm prepared to do anything to experience Nirvana. Enough of supporting these cravings and desires, they have only lead to great suffering. I don't want to take another birth."

Au contraire, the second one says "I want to enjoy the basic things in life. Though I've undergone a lot of sufferings, I should enjoy at least a little before leaving this world, its only fair. Is it wrong to enjoy things?"

Whilst I vaguely used to feel this divide since long, its only since I've started practicing Vipassana that it has become more pronounced. Its as if like a big battle is going on between these two forces, and I'm just a spectator. Is this feeling normal, or my case is any different?
I would say dont bother with any of them. Simply note them as mental formations. They belong to the 4th aggregate and are under the effect of the 3 signs of existence.

Note them and see how they arise and cease like all other conditioned phenomena. There is no "self" experiencing this - there is only the arising and cessation of mental and physical phenomena.

Dont identify with them. Dont take ownership of them. These phenomena are impersonal and empty of any substance.

You should look up Conventional &amp; Ultimate reality - Sammuti sacca &amp; Paramattha sacca.

Or

Check out the discourse on the Anattalakkhana Sutta by Mahasi Sayadaw. In this discourse it is described thoroughly and in detail why the 5 aggregates cannot be taken as a "self".