I'll recuse myself from voting. I've only ridden Steel Vengeance twice. It maybe, just might be a better ride, but I think Millennium force is still my favorite.
See.. my thing about Millennium Force.. the drop is phenomenal.. stood the test of time and then some. The sense of speed is great too but.. it doesn't really do much else? The airtime ranges from decent to mediocre (cold/wet/windy). The forces are.. ok? Doesn't blow you away. It's far from the complete package so I never understand what people like about it so much to rank it higher then other rides.
I do know some fanboys who like it intensely (not pointing fingers.. even though you do have CP as your favorite), but I do know some well traveled vets who still love it as well with little to no explanation. I've always found the "well it blew me away the first time" argument as null as I've had plenty of rides that did that fall as more complete rides rose after the fact.
I do find it funny people love Millennium Force and hate on TTD yet they really are both.. kinda one trick ponies in a sense. It's hard to do alot once you go past 90+ but still.
I will note that, like some, I was once a major CP fanboy but once I started venturing farther from the sanctum of noses up butts, I found far superior and complete rides out there. It's a shame the ride and the park in general have many people who thumb their nose at the rest of the community as well as the ride and park are both a good time, just not the Jesus Christ saviors that many make it out to be.
/endrant.. sorry.. had that built up.