I tend to use too much ","'s in my sentences xD Also I use the word "also" too much (see beginning of this sentence) or too much of side-explanations in "( )"
In real life I put too much space between the words and too unevenly distributed. People tend to find that really annoying.
Hmm, interesting... think my friend is exactly like you. I don't mind long sentences (too much "," and brackets), since I do that myself as well. But the uneven spacing between words is annoying as hell, really, cause when you copy-paste each others work together it becomes hell to fix layout, fonts, aligns, formats, and stuff. Sometimes I wonder how difficult it is, to just hit the space-bar only once between different words.
Conclusion, just write the way you like as long as you keep layout, aligns, formatting, and stuff consistent XD
PS. also highly annoying is the formatting for pictures in reports. If you got reports of 50+ pages, the last thing you want to do is fixing layout and reference issues with pictures/graphs/tables. People who tend to mess up with the space-bar, also tend to mess up with this.