Simon Pegg was famously
crushingly disappointed with
The Phantom Menace, although he fits the profile of the early middle-aged fanboy (as does Iain M. Banks, that goes double for him). However I knew of a fair few people in a similar age bracket to me now (early to mid 20s) who were pretty young when
TPM came out and who were either indifferent to the movie or actively disliked it, but that is fairly anecdotal by definition.
Jake Lloyd was only a boy at the time and the relative annoyance of his character stemmed from the directing and scripting of Lucas. However in
The Phantom Menace,
Attack of the Clones, and
The Revenge of the Sith we got very strong cast members that seemed to get lost amongst the towering CGI sets, swarming sprites, rippling ILM explosions/laser beams, and invasive model work; it came across as cold and distant. In
TPM Bryan Blessed was wasted as a virtual muppet (he was better utilized in
Freddia as F.R.0.7), Darth Maul was excellent but underused, Qui-Gon played by Neeson was generally successful, and Ewan McGregor almost seemed to be phoning it in as a young Obi Wan from the start, although he improved as the PT went on.
Only Ian McDiarmid as Palpatine was very successful and done proper justice in all three movies.
Jar Jar Binks was the perfect storm of misjudged marketing, gimmicky CGI animation, irritating voice acting, and forced attempts at comedy relief that pleased nobody. Natalie Portman started off reasonable, but ended up awful, and Hayden Christensen was pushed into the deep end like Jake Lloyd was.
The Phantom Menace was nowhere near on the same level of fail as
Wild Wild West (Will Smith's
Pluto Nash) but I did slightly prefer
The Mummy to it as entertaining hokum, and
The Matrix was more creatively groundbreaking (although let's not dwell on their unnecessary sequels that were worse than
PotC: The Curse of the Black Pearl's).
My personal scores for the PT films:
The Phantom Menace -
6/10
Attack of the Clones -
5/5
The Revenge of the Sith -
7/10