I'm so glad you decided to stick with your drill. Here's my bad experience with a nail gun: My parents decided to build a garage/shop about 10 years ago. I helped. Mom and Dad got some new tools (building a garage was a nice excuse to get some) and one of those was a huge honkin' nail gun. I was helping Mom while she was using it to nail some ceiling joists and she asks if I want to try. Ok, I'll try. She hands it over and I hadn't even held it for 5 seconds before it went off. Not sure if I hit the trigger or it did it on it's own but a nail came shooting out and hit the beam between Mom and I. If the beam wasn't there, the nail would have hit Mom's head. I hand the nail gun back to her and said I needed to do something else - didn't tell her what happened. So, yeah, if I'm going to use nails, I'd rather bang on my own thumb.
Here's a trick I learned from my dad - when screwing stuff together, use two drills. Have one set up with a drill bit to get a pilot hole going. Have the other one set up with the screw bit driver that you need to screw the screws in. It saves time from having to swap bits and drivers out of the same drill.