Weirdest one I remember was when I was about 14 (I still remember that dream to this day!). For some reason I was Rodimus Prime but my feet were roller blades and I was skating after someone along the street that leads from my parents house but no matter how fast I tried to go I kept getting slower and they kept getting further and further away. I don't recall who I was chasing but for some reason that one stuck with me.
There is also the obligatory dreams of purchasing all these rare bots and waking to realise it was a dream. Sometimes I realise in the dream that I'm dreaming and it's not real, like the other night I picked up a MISB Overlord from a market for $10.... yeah right... even my subconscious knew that shit just doesn't happen!