You should tailor your bets perfectly instead for the particular situation and opponent.
So you should never stick to so called 'standard' bet sizes in all situations. You are free to bet anything from the very minimum amount (one big blind) to your entire stack at any stage of the hand. No Limit Hold'em in particular can be best viewed as an art. But sizing your bets properly can actually make a massive difference to your bottom line at the tables. Bet sizing in poker is something that a lot of people disregard these days.