mspencer wrote:

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There are exceptions though: Monsoon has this "red red red yellow red kick yellow+blue kick red+green" thing near the end you have to lead off with your left hand, or else you'd have to cross your left over your right to hit the yellow.
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I would play the beginning of that part as RLLRL, with R being right hand and L being left.
The vast majority of the time, you'll just be doing traditional single stroke rolls, which is just RLRLRLRL etc. This is good if the notes are on 8th or 16th notes (not triplets so much. It's possible, but you'll alternate your left and right hand on the beats which can be confusing. See: Foreplay) and the drums you're hitting are going from left to right.
Another rudiment which is much less common in RB is the paradiddle, which is RLRRLRLL. This can be useful for a number of instances. I can't think of any songs that require it off of the top of my head. If there's an 8th note roll that goes from blue to to yellow (somewhat rare) a paradiddle is handy, because the last blue hit will be with your right hand. leaving your left hand to move to yellow to finish the roll.
A rudiment that is very usefull for triplet rolls like RRRYYYBBB is to play them as either RLLRLLRLL or RRLRRLRRL.
The hard part of foreplay uses RLLRLLRLL, so if you can get that down you wont have too much trouble. I'm left handed, so I'm better at RLL, but RRL works just a well for most instances.
Now, in the context of Rock Band, you don't
really need to know any of this. All you need to realize for RB is when to hit a drum twice with the same hand, which is a skill that builds with practice.