I can roll my r, for no particular reason, quite well. The only word I have trouble with is нравится. I was reading up some more on tongue positions and whatnot and came across this contradicting article: How to trill (roll) your R | therussianblog . It says hard р is just back of the ridge where you make the t and d sound. Got it. But then it says "The soft “r” is a palatalized trill that is produced by touching the tip of your tongue to the back of your front teeth." . Again, for some reason I can do this without trouble, but apparently this is untrue. Many people tell me that soft р is just.. not rolled... Sorry for the twentieth post on rolled r's.
Also, stress in words. Smaller words. Like что is sometimes said "chtuh". Particularly with потому. How do these work?