Yes, I want 3;5 out of the had. They are only going to put money into the hand if they are winning. Most players I play against are decent and don't throw away money on 3;5 unless they hit a good hand like at least two pair. So it is to my advantage to get hands like that out.

The A;5 is kind of a toss up. If you let other hands get in with out raising against many opponents all of a sudden little cards are dangerous. Family pots are bad if you have a good hand pre-flop. A 5 card is all of a sudden a dangerous card. If an A and a 5 hit the table you are probably in deep trouble.

If you let 8 oppenents get in against your AK, you will lose quite often. 4,5,8 is now very dangerous because it is very likely one of them has at least made a pair and you are trailing.