I too use my rear brake A LOT. I use it every time i come to a stop. It's simple physics. 3 calipers clamping 3 rotors is going to slow you down faster than 2 calipers clamping on 2 rotors. It's especially helpful in situations where you're riding slowly on gravel. Lock up that front wheel, and you'll be kissing the rocks faster than you can blink. It's also great for lowspeed maneuvering... Pin your throttle at about 2000 rpm in 1st, and just control your speed entirely with your rear brake. I had a police instructor show me that one, and it works like a champ...
As far as "feel" goes with the rear brake, after recently switching to a new pair of boots, i can definitely say that it's just something you need to get used to.
I used to ride mostly in a soft-soled, casual boot without much stiffness or protection. I could really easily feel what the brake was doing.
I switched to the Sidi Strad Evo-Air boots, which i can't say enough good things about.
http://www.newenough.com/boots/sport_street_touring_boots/sidi/strada_evo_air_motorcycle_sport_boots.htmlThey have a nice thin profile, which makes shifting easy... but i have noticed that the soles are very stiff, almost like boards.
At first it was very hard to feel out the rear brake properly... But after a few sessions, i had started to get used to it. It's just like my old boots now.
I'd say, get yourself some nice boots that you can afford, and then just work on getting used to the change and how it makes your rear brake feel.
You'll make it work just fine.