For you guys talking about the circular saws
I trim down a lot of board stock 3/4" and less and have really gotten quite used to the left side blade on a lightweight 6 1/2 inch cordless saw. I have a Makita. Mostly one handed use for quick crosscuts. I'm right handed and so my left would be holding the stock. Drawback mostly the entire base and the full weight of the saw is out over your cutoff piece but good line of site and I usually watch the blade on the line.
But recently I got the "deal" the 9.0 and 7 1/4" circular, hard to beat it!
And to me a right hand saw blade is more adapted to using both hands on the
saw for right handed person. If I hold the 6 1/2 with both hands crossing over with my left I now cant really see the blade at all.
Also I most often use the plate guide notch to follow a marked line with a righty and generally using both hands on the saw but watch the blade on the line with the lefty using just one hand to hold the saw too.
Of course many corded right side cut sidewinders most always required using two hands simply because of the overall tool weight. but since owning 2731 I find the lightweight Fuel now lends itself pretty good to one hand control too.
It's a good 2lbs lighter than my corded Makita
I normally don't use cords for handheld power saw at all anymore.
So I do use both types and sometimes one just works better/easier in certain applications like trimming off a rafter tail or doing a countertop cutout. Right to left cut vs. left to right cut...
Though with enough skill you make what ya got work
IMO if you had to pick only one to own obviously define your needs. A 6 1/2 is fine for crosscuts and limited rip use. 7 1/4 design been a standard for most construction work for a long long time now.