I had someone comment after my match last night that some guys might get pissed off with some of my serves. Every now and then I would throw in a "junk" serve when my opponent had just made an error and right after they usually try to blast a "junk" serve and make an error. I did this maybe 6-7 times total the entire match. My junk serve is usually one that I hit "3/4 sidearm" softly and try to drop it in the left front corner of the box, just over the net. If hit correctly, the opponent returns it right back to me and I then have an open court for the next shot. Another "junk" serve I use is to just slice it in low and soft with a very compact swing. One more is where i just pop it in soft and flat and low and try to ellicit an error. My opponent claimed I didn't need to use these serves since my normal serve was very good and that I didn't double fault the entire match (true) so that I didn't need to do these tactics. It's true I don't NEED to do it, but sometimes it's just fun to throw in a "changeup" serve. Is this considered "cheap" or "bush", sort of like an underhand slice serve?