I agree with the comments that hadoukens, shoryukens and other special powers should be reserved for key moments and not something that they throw around like it's just another punch.
I actually loved how they did it in the SF II V series, Ken and Ryu had to REALLY concentrate a lot to pull them off and it left them drained for a while after. It somehow made it seem very real to me.
I also like that in that show, special "powers" were limited to only the top tier characters, in this case Ryu, Ken and Bison. It made them seem even more special.