I have zero regrets. I studied Canon, Nikon, Sony, Olympus, and Pentax for over a year before I bought a camera. I joined a forum dedicated to each one and learned the in's and out's of every brand.
I studied the 24-70 and 24-105 lenses specifically (my hardest decision) for 6 months before finally taking the 24-70. The 100 macro, 70-200 f/2.8 IS, and others were simpler choices, but you can be sure I knew exactly what I was buying, and what I could have bought instead, before I pulled out a credit card.
Therefor I have no doubts, regrets, wishes, or anxiety. Just fun.