Bled is, as has been said, lovely but it is a tourist spot-often busy in high season. From our place you can get there in a couple of hours so it is somewhere I have been lots of times. It's also where we take visiting older relatives for a day out and that is my view of Bled. A pleasant enough place to spend of few hours, eat the obligatory cream slice, take a few photos and then move on. If you want to spend a few days in Bled then it's fine, if you want a touring base then there are plenty of other quieter (often cheaper) places from which you can make a day trip into Bled or, better in my opinion, Bohinj- not as built up as around Bled.
Don't miss the Mangart road especially if you get a clear skies day-the road is interesting but the view from the top is simply as good as it gets.
As I have tried to make clear the above is a personal view, it's not for me or anyone else to tell you how to spend your holiday, whatever you want to do will be the right thing for you.
John