I ran SMC's the first couple of years which were all 2S2P, then started using others when I went to 3S and now go with 3S1P or 4S1P.
So far, the liperior 45C 5000mah 3S packs are working really well for me in my 6S trucks. I get good punch out of them and decent run times. For their size/weight/performance, if they last me 1.5-2 years, I'll keep buying those for everything 3S and similar version for my 4S trucks.
My weakest packs are HRB 5000mah 50C packs. I typically ran those only in my ERBEv2 as they were the lightest/thinnest packs I had. I still use them, but they are taking longer to charge and the punch fades pretty good once they hit 50% empty or so.
The heartiest packs I've had were hobbystar 50C 6200mah 3S packs. They had great punch, decent run times, but were thick/heavy. I'm phasing those out in favor of the liperior 45C's.
I have a set of CNHL 65C Black 5000mah 3S. They are kind of heavy and barely fit in the ERBEv2 with the battery clips in it.
My first liperior purchase was a pair of their 65C 5000mah 3S. They are too thick for the ERBEv2 and are heavy. I'll only run them in my outcast, but when they die, I won't buy them again. I like running the same thing as much as possible in all my trucks. Avoids confusion and keeping track of what does what.
I'll feel better and the end of next year suggesting the liperior's to others. I figure if I get 1.5-2 years out of a pack, then that's a good life. I tend to run to LVC every time and I charge at 1.5C usually.
Size comparisons: