would have agreed with most until I rebuilt a bike earlier this year for my littlest. Changed the wheels, drive train and bars/stem, kept only the frame and seat/post. After our first ride she noted that she was not happy with the ride, despite changing most to better parts. Spent the rest of the weekend trying to dial in the fit as she had grow 2 inches over the fall and winter. Next ride, still no good, which had me puzzled. I was also building a new mtb for myself and swapped the locking grips or a set of generic Pedros soft grips. This did the trick, it didn't occur to me at first, and she enjoys riding the bike much more than before. As I look at my parts bin, the parts I have most in surplus are grips, tape and wrap (price obviously a factor). After that experience I've taken significant thought into matching grips to the build. Grips/tape may not be my top pick but definitely a top 5 for me.