Yes, you should. And then you should play SH3, which is even better

I always kill him in one shot with the rocket launcher you find in the castle so I have a hard time finding him intimidating.

this

Seeing this little green-like creature waggling towards you without getting hurt...

intimidating...

Tonberry's

there is a new boss in gears 2 that is gonna be crazy and pretty intemadeting he has a staff with two chainsaws on the end i cant rember his name

They aren't characters per se, but Striders from HL2 were pretty intimidating. They has War of the Worlds written all over them, further reinforced by the firepower they had.

Mr. Bubbles from BioShock. I was so scared not to shoot one by accident before I was prepared with the area that I didn't fire a single round while they were around, even if there were 10 splicers as well.

Thadius from Metroid Prime. Maybe it was the fact he rose from the ground from a bunch of rocks or the fact that I never have once seen him in his entirety on one screen.

Baal from D2: Lord of Destruction. You saw that opening movie too, the one with the poor barbarian messenger.

Hellknights from DOOM3. Let's face it, almost everything in DOOM3 scared you shitless, but somethings were "OMG it jumped from the shadows" type of fear, the "I'm getting swarmed by demon babies" type of fear, and then there was the "I have the pistol and the shotgun against a Hellknight and the way behind me just closed" type of fear.

Counselors from HL2:ep2. If you've played through episode 2 you know the reasons, I don't want to spoil it for anyone else. Props to Valve for the helplessness they instill in the player.

There's my list in no particular order except for the last 2.

Baal kinda felt like he was 'overdesigned'. he looked rather foolish and not scary.. actually the fight with the ancients was much more pressured coz you couldn't TP out :P

Really? I found the ancients easy stuff,didn't die once. When I got to Baal 20 minutes later I died about 23 times. His freezing V has to be one of the most devastating attacks I've seen in games.

he just wasn't scary at all. the ancients fight was a bit intimidating coz it felt like.. a growing up process. and there were 3 dudes too

First time I ever fought Baal, way way way back in the day I was just waiting for him to do to me what he did to that guy, I'd just run around in circles and get a hit in here or there expecting to blow up at any moment lol.