If you're doing this kind of thing frequently, fleets are probably a bad thing for you.  I also like to move all my units around individually, and I find fleets cause me more hassle than they help.  Using fleets is entirely option and the only benefit is easier micromanagement.  If your particular playstyle isn't helped by fleets, there is no reason to use them at all.

Thnx for the help guys. I was under the impression that fleets are the way to go in this game, but I'm more comfortable just ctrl grouping types of units together and microing individual units during battle, (most of my RTS experience is with Warcraft 3 where you constantly micro individual units). 

So if I want to have better individual unit control, it's probly better to not even bother with fleets at all? If I don't make fleets, can i still rally units from my barracks to my units so I can reinforce during battle?

Yeah, just remake the control group.