I started with a 4 footer (55gallon) about 18 years ago. Within a year I had 2 four footers and a 7 footer in my bedroom, with my bed somehow squashed in between. Surprisingly my parents never bothered. Sold all those off once I moved out and discovered girls and booze, but then got back into a small saltwater set up about 10 years ago. Moved to a bigger house with my current fiancée and got a 6 footer promising her that it would be plenty big enough and I would be happy with it. That lasted 2 months before I had, in her words "tanks everywhere". Sold all except the 6 footer and started planning my current 8 footer (240g). I was absolutely certain I would never go bigger. I've had it now for 2 months and love it. One random conversation the other week with my fiancée led to her saying without any prompting on my part that she'd be ok with me having a tank that took up the entire wall. The seed has been planted and I can't stop it now. Damn it. That's one of the reasons why I love her. She knows what I need.