Let’s get this out of the way: I don’t like Bootstrap.
Now, as an author, I wonder if you need to base your admin template on Bootstrap if you want people to buy it.
No, not at all.
In fact, most good authors don’t even use a framework at all, but have created their own.
Also, there’s nothing to hate or like from Bootstrap itself – just take from it what you could use and remove the rest
The trend is force to use bootstrap this days because clients are familar with system and want easy way to change and adapt template, if you base your admin theme in bootstrap you will get more sales this is fact. Other good trend is to base template in new metro flat style. Other template just not have a chance belive me or not.
Good luck denkGroot you are very good i advice you to convert your last template to bootstrap.