i prefer sativa's... i tend to be plenty lazy enough on my own, and don't need any extra help from a heavy indica.. i also don't like that burnt out feeling i get from smoking too much of a heavy indica..
i love the way a good sativa will make my lazy ass want to get up and do something.. work or being creative go hand and hand with sativas for me, so that's what i prefer.. i love what someone else said earlier, go for a nice walk after smoking sats, gets the heart beat up, the blood flowing and makes me feel alive.. indica's have very much the reverse effect on me.. i'm too damned depressed as is without the help of heavy indi's..