When it comes to personal weapons, I also prefer ballistic to energy. From what I can understand, you cannot "top off" Energy weapons, you just load in a new cell.
There are advantages to this, Energy weapon cells can be recharged, while you would have to buy more ammo for the ballistics. Being able to recharge energy cells from you ship/room interface, would be a boon. Especially for long range/deep space missions.
I usually carry a LH86 as my Sidearm, with a P8-SC as my Primary and either a R97 Shotty, or Scalpel for my Secondary. Also grenades. Always. have. grenades.
The Oxypens and Medipens are givens...