Avatar, Star Trek and The Blind Side are the best movies of 2009, based on more than 55 million moviegoer ratings at Flixster, the world’s biggest online movie community and leading mobile movie-information provider.

Flixster’s list is based on the average score users gave to each of 150 wide releases. “Out of 55 million ratings, only three movies – Avatar, Star Trek and The Blind Side – received more than 90% positive response, which is really impressive,” said Joe Greenstein, Flixster’s co-founder and CEO.

“Lots of critics create year-end ‘best’ lists, but Flixster’s top 10 list is determined by what real moviegoers say,” Greenstein said.

Topping Flixster’s Top 10 of 2009 list: Avatar, which has received more than 450,000 ratings since opening Dec. 18, and has a 92% positive rating from moviegoers.

“It may be true that you can’t please everybody, but Avatar comes about as close as you can get,” said Steve Polsky, president and COO of Flixster. Star Trek was close behind with 91%, and The Blind Side had 90%. “They all have one thing in common: They’re not just for adults or kids, but movies that all ages can enjoy together.”

According to Flixster users, the 10 best movies of 2009 are:

1. Avatar (92% positive)

2. Star Trek (91%)

3. The Blind Side (90%)

4. Up in the Air (88%)

5. Inglourious Basterds (87%)

6. The Hangover (87%)

7. Zombieland (87%)

8. Up (86%)

9. Michael Jackson’s This Is It (85%)

10. Taken and I Can Do Bad All By Myself (tie, 83%)

On the opposite end of the spectrum, the year’s lowest-rated movies were: Whiteout (35%); Year One (32%); Dragonball Evolution (30%); Streetfighter: The Legend of Chun-Li (30%); and Transylmania (25%).

Transformers: Revenge of the Fallen had the most reviews and ratings at Flixster – more than 3.8 million ratings (76% positive) and 125,000 reviews since June.