My biggest automotive regret was selling mine! (Sold it reduce the out of pocket on my wife's new X5 last year - dummy!) I think they're fantastic cars. Easy to work on, plenty of mods available and absolutely bulletproof. In almost 6 years with multiple track days my 2005 never saw the dealer for a single issue.
Depending on where you live, I do think it helps to be single and young for it to be your daily drive. The fun factor drops about 50% if you have to have the top up all the time. An awesome second car - when I had both it and my E90, I drove it way more.
Also - simple bolt-keyed seat locks keep the seats where they belong. I never had any problems.
PROcede V5Rev3+Openflash stacked, PWM Meth, DCI, BMW PE, ETS FMIC, Koni's w/Swifts, Rogue, Powerflex, SWS8xi's, VMR 803's in Solar Rain, LUX V4