I guess this is my top 5...but i really cant even remember half the anime ive watched, so yeah subject to change :P
1. Naruto
Yeah yeah yeah lots of filler, time wasting etc. I stil think episodes 0-140 of the original Naruto is so well done its unbelievable. Its my kinda anime, interesting story, interesting characters, not a complete focus on one or two particular characters, action scenes and fight scenes done well doesn't just rely on a power level :P, animation was really good at the time (stil is imo), pacing was great never let up! Some bad points, filler, too many flashbacks at times, cheesy as hell (although this was one of my first anime so wasn't really cheesy for me).
2. Naruto Shippuuden
Meh this is just here by default because im such a big Naruto fan, really doesn't come close to the original series. Animation quality varies, they don't really follow the manga accurately, time wasting has become insane lately, flashbacks and filler are always ten episodes away. Too much focus on two or three characters...however most of the good points from the original series is stil there just more rare and becoming even more rare as the series progresses.
3. Kekkaishi
The only real problem i have with this series is that it ended at 52 episodes! Very funny, interesting story, good animation, good fight scenes, again my kinda anime :)
4. Dragonballz
This was something i grew up with and at the time i really really loved it.
5. Fairy Tale / One piece / Bleach /
I dont really place these in my top animes but i liked them for the most part. Bleach started out really good but got killed with filler and the story just went to shit imo. One piece i found to get boring at times but really funny :). Fairy tale is pretty new and also gets boring at times, im stil undecided on this as a favourite of mine yet.
Hmmmm i also really enjoyed Gintama :D the most funniest anime ive watched but mostly a pointless anime lol