MCU Loki or MCU Ultron?

Who do you think was a more intimidating villain?

Neither. That's like asking whether a mouse or a hamster are more intimidating

Ultron got less intimidating as the movie went on, it was really disappointing. He never seemed like a true threat. Loki on the other hand...he was the man.

Physically, Ultron.

Mentally, Loki. His Mewling Quim dialogue was more menacing than anything Ultron said.

Neither

Liked both. They were actually the kind of villains who used their brains, unlike Ronin.

I agree,and his dark humor showed his psychotic personality when he sliced Claws's arm off or whatever that guys name is.

neither

Ultron

xoxo, -Saint Sophie

Their both jokes and nonthreatening.

Loki is more charming than intimidating, so Ultron. Ultron wasn't scary though

Loki

Neither.

However, I think Loki was a better overall villain than Ultron. His charisma in the first Avengers won me over whereas Ultron didn't have any qualities about him that I particularly liked other than his voice. He also lacked menace.

Ultron.

Loki's just a pretty boy.

Ultron

Loki?

neither...but Loki probably had the best lines...

Loki. He very well may be the best character/performance throughout the entire MCU run at this point still

Well I expected more from Ultron but I guess he was still more intimidating compared to Loki although Loki was awesome as well

Neither. They were both terrible atrocities.

Realistically Ultron but both were very much watered down from their comic book counterparts.