Adam . . . I love that boy. I wasn't even a big fan of those early seasons, but he always stood out to me. Very cute, excellant martial artist, held his own as a ranger unlike many other green rangers. Myriah once said on her site that he could have become the red turbo ranger, I believe. I think that could have been a great turn for the series.
Tommy.- 1) He's the only sixth Ranger on his list. 2) He's Tommy, and people will oo and aah anyway. lol. 3) Zyuranger's footage really helped (he was their FIRST sixth ranger as well), but evil Tommy's voice was really a memorable part in Power Rangers, not to mention his own career IMO. His "weakened powers" is a template for all other series and I don't think any of the other times he was a Ranger were as memorable other than maybe his leadership skills in Zeo.