No, tb86, there's no problem in loving the Transformers movies. Look at my musical tastes: I habitually listen to light pop music, I think 'Problem' by Ariana Grande is delightful, and I fill burned CDs with pop and urban music. Justin Timberlake has a special place on there. A lot of WP members would tell me that I have terrible taste in music, although I'll also occasionally listen to Deep Purple or Living Colour.
As for films, I mix it up. I've seen the big three superhero movies that have been released this spring, I enjoyed the heck out of all three of them including Amazing Spider-Man 2. But I also go see movies with a bit more substance; I saw a Thomas Vinterberg film, I saw No with Gael Garcia Bernal, I went to an Asian film festival to catch a couple of well-put-together Indonesian movies. So I try to keep it balanced. But I love me my caped crusaders and masked avengers, and nobody can take that away from me because I own it. 
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clarity of thought before rashness of action