Depends on if the game and if the combo is a true combo or a custom combo. A zero to death is almost never fun but a 15 hit combo like tekken that takes weeks to practice is usually about half health but when you get hit in competitive tekken its basically a TOD. Naruto Shippuden Ultimate Ninja storm 4 can have really long combos because you have so much health but its definitely not fun to get hit with a 57 hit combo in street fighter or kof