I don't really have any issue with bitcoin itself but my least fav thing is the lack of real world places to spend it. I suppose the confirmations could be a little quicker but it's not really an issue to be honest.
The least favourite thing about bitcoin to me is that it takes to long time to get the first confirmation. We need to increase the block size.
Yeah that is true, but that is affordable when it comes to bitcoin, as bitcoin is offering us many other benefits so I will neglect the factor of delay in confirmation.
I am ok with delay in confirmation time but the other thing that I don't like is no one around me is aware about it and even I am not able to spend it directly in local stores around me.