The first season of this cartoon contained painfully bad animation and rather weak story lines and a terrible opening with a cheesy theme song. The characters looked too stiff, especially the Thing, and my 2 favorite guest characters looked awful; Doctor Doom looked badly out of proportion, and the Silver Surfer looked like a walking piece of melted wax. Fourtunately after the series was (miraculously) renewed for a second season Marvel switched to new animation studio and the show was vastly improved, the animation was cool and looked similar to the X-Men cartoon, the characters looked better, the story lines were mostly adapted from the original Lee/Kirby run on the comic with great faithfulness and there were tons of cameos and guest roles from various marvel heroes and villains, including the Silver Surfer who looked awesome, plus it had a great opening that showed classic moments from the comic brought to animated life. If you get the DVDs than take my advice; skip the first season and go straight to the beginning of the second season unless you want to laugh at the bad animation.
