Big Bertha: Meh... Never been my thing. I just can't get excited about it. I'm only interested in it for parts.
Der Red Max: This took a long time to grow on me. The tipping point was hearing Mel Brooks talk about how the best way to deflate the Nazis was to make fun of them. I realize that there is no Nazi markings for this kit. In looking at the original instructions, it has a MAD! Magazine/Laugh In vibe.
Goblin: Also took a long time to grow on me. I'm not overly thrilled with the original version (too small IMHO (I'm a big fan of getting my rockets back after a launch, and I'm worried that this one would be a one shot and lost situation)). However, upscaled to BT-60, or larger, it has my interest.
Citation Patriot: One of my first 10 rockets (possibly at the tail end of the first 5). Big, colorful, sexy... Great flier... Fun memories (It's first launch was at dusk, and I could see the flame all the way up, and I was barely able to see it as it came down, and was lucky enough to be able to catch it). I love my modifications of it (adding a 2nd stage, and payload section). This was one of the first ones that had a pretty good (not perfect) paint job.
Astron Omega w/Cineroc: First seen (by me) in the 1971 Estes catalog that I got from my band teacher who sold me his Saturn V, Estes Trident, Centuri V2, and Mach 10 kits. I fell in love with its lines and the beautiful markings... The idea of being able to film a launch was very appealing. However, I was too late (by 8 years) to buy one of them, and didn't get online until the 90s, and was very limited in my abilities to afford the hobby prior to 2013, when I spotted Techmoan's videos on the 808 camera. I'm still trying to get the final work done on the CinerocDV project... I just can't find someone with the time, resources, and skills to copy the camera shroud to push this over the top.
Astron Cherokee-D: Colorful, Sexy, D powered... Likely my 3rd kit. Need I say more?