I used to only play acoustic by myself and then started playing electric. They are two different beasts, imo. When I play acoustic with someone else, I play different chord voicings. Example: If they play in the open position, I play barre chords. Or sometimes, I'll capo and transpose the whole song (this is how I play Tangled Up in Blue, for example, capoed at 2nd fret)
For electric, I play with a band and it's completely different. I play rhythm, even if I can't spell it, and I strum chords or play arpeggios. I play from the Chick Corea school of "It's not what you play, but what you DON'T play". On acoustic, you want to fill in, but on electric, you need to play more sparse since there's drums, bass, etc.
One last caveat. When I started playing with others, I realized my timing was way off because I played songs the way I "thought" I heard them, which was often inaccurate. It takes a little while to realize that others play things different. You have to figure out which way you want to play it and both play it the same way for it to sound good. I hope this helps. BTW, it improved my playing 100% to play with others!
"The only funeral you should ever try to interrupt is your own, and that should be a full-time job." -Kinky Friedman