Well both are representing the same information, just in different ways. So it all depends on your preference. Many courses use Candlesticks to explain their material so for this reason candlesticks are most popular. So try and use both and see with which one you are more comfortable with.
Personally I use bar charts since I find it easy to draw trend lines and find support / resistance points. But again it is a question of preference.
However sometimes I do switch to candlestick charts to visualise better reversal patterns because yes it is true certain reversal patterns (like hammer, shooting star) are easily to visualise in candlestick charts than bar chart.
