Alt Rock that just sounds like a wack DJ who would suck with sync or without sync. If you dont have that basic level of knowledge of course it would sound like crap. It is obviously different for everyone, I just checked out a mix on your mixcloud and ya you played a lot of organic sounding music of different genres so sync is obviously not ideal. But if you are playing a house set or whatever I dont see the point in spending time beatmatching when I could let my computer do it for me so I can focus on other things and be more creative. I prep my tracks before hand so I know the beat grids are bang on so why would I do something redundant that is a complete waste of time? I can manually beat match if I want but to me (for my musical taste) it is a waste of time.