julias.andre wrotewell that's must be many places you need to visit in bali, but seminyak is the best place to be a base. :icon_biggrin:
I would have thought that for a deeper cultural experience, anywhere away from Seminyak & Kuta would be better. For example, much of the tourism around Ubud is aimed at those who are "searching" for something.
Do some Google searches with 2 words, "ubud" and one more word like spiritual, wellbeing, wellness, yoga, retreat - and just browse.
Alternatively, look at Tripadvisior, they have a listing of Things To Do In Ubud - there are around 70 and include cooking classes and spas, but also things like eco cycling, herbal walking, healing centre, etc.
Or you can get further away than Ubud and still find reasonable hotels. For example, Manggis (between Padangbai and Candi Dasa), Sidemen, around Lake Batur, or Tirta Gangga - to think of a few around the south east. The Lonely Planet Guide is useful in finding places like these.
Then there is all of North Bali and West Bali still to be explored.