Hi Anand, a warm welcome to Karnataka. KARNATAKA is a beautiful state, with a official tagline 'One State, many countries'. As the tag line suggests, its one state having many countries in it. Below are few must visit place in Karnataka interest wise:
Nature lover - Augumbe, Shivamogga, Madikeri, Jog falls, Duddh sagar, shakalespura, chikkamagaluru
Architecture lover - Hampi, Belur, Halebidu, Srigeri, Mysore, Gol Gumbaz
Spiritual trip- Temples such as Udupi, Mantralaya, kollur, Gokarna, Mysore, Sirsi
Party Animal: Bangalore. You have India highest pub in capital of state.
Hope it was useful!! Explore!!