Im not have a lot experience on mining, but i think largest pool is good for me. Because i dont scared if the pool is gone or scam. Because i have experience mine on some pool but they gone when i withdraw nothing from them. Lees fees its good

If you go with small hash rate on largest pool and if that pool has low value for PPLNS you get more or less nothing

- so largest pool is not always the best one

Just read through the board and you see several well-respected pools so you can choose one with a payout-scheme fitting your hash rate.