Give it a shot - it's a fantastic ride. You may have found that there are lots of people on the boards who don't like rollercoasters generally but love BTMRR. Listen to them. They're right.
BTMRR might toss you around on all the curves but there are no significant drops - a couple of dips but that's all. Others may disagree, but I've found that I feel those more sitting towards the front than the back (but the back feels faster and bumpier). FWIW, the "drops" on 7DMT feel bigger than anything on BTMRR, but it's a smoother ride so a bit friendlier to those who don't really like coasters.
I'd also recommend that you don't rule out SM - there are no big drops on that one either, mostly turning and twisting like BTMRR (and, IIRC, actually slower than BTMRR). So if you end up liking BTMRR, give it some consideration. It's also an amazing ride. The dark and not being able to see where you're going gets some people, but so much fun. My recommendation? Try BTMRR during the day, then at night if you like it (when the ride "feels" bigger and faster - but seeing the stars above while on the second lift hill and you're among the monuments is amazing) - if you also like the nighttime BTMRR, you just might like SM, too.