Dude this is not a p0rn site.... and how exactly is your question suppossed to spice things up when it's sooooooooooo boring...?!
ermm i like mixing it up and not sticking to one position :L
cowboy or reserve cowboy position? great for a girl as she can set the rhythm - that' said I do love it when my boyfriend has his way with me sometimes!
Both but it depends on her mood.