My preference is for Cruz.
I've seen nastiness from both sides towards the other, and it's been legion and will likely get worse until one of them wins. It's been fairly even from what I can see.
I've seen a lot more nastiness from Trump supporters. I also have seen, in individual voices (because I keep count) MORE FReepers like you, who prefer Cruz, than people who prefer Trump. By my count, it's not "fairly even," it is tipped in Cruz's favor with regard to preference.
Neither is it "fairly even" with regard to hostile angry personal attacks; Trump's supporters dominate in that tactic of "debate."