Do you roll with partners of all shapes and sizes?

I've been training for about 3 and a half months. I'm 6 feet and I weigh 160. I like rolling with bigger guys because you learn how to disrupt positioning a lot better if you want to sweep. Otherwise they will just sit on you until they get you with something. I find it's a lot easier to control guys my own size but they tend to be a lot more explosive which makes it harder to secure submissions.

I don't know if this is the right thread but I was wondering if anyone had any ideas on what to look for when someone is exploding to transition to a submission. Should I just attempt to control them? I like to try to control them in a way that forces them to explode into a position that is more advantageous for me.

I roll with anyone as long as they dont smell. I am 120# girl. but the guys are nice enough not to muscle me to much. and i think it helps me when i end up grappling someone my size (girl or guy). I have pulled off legite subs on bigger guys. I do hate it when they use their weight to just hold me in side control or mount and not try a sub and i am trying to shrimp my butt of to get out.